Imo? Doomwar most definitely should not be part of the BP trilogy of films. Seriously.
Given the grand scope of MCU plans? Growing Doom...a single villain whom the F4 will vanquish in their trilogy of films...into a MCU level threat will be a huge step down from Thanos. Unless there is a plan to NOT have a single Big Bad for Phase 4 like Thanos was the ultimate Big Bad for Phase 3? Doomwar most definitely shouldn't happen in BP at all; not only because Doom himself hasn't been established as the truly formidable arch nemesis that he is, but frankly because Doom isn't sufficient enough of a threat to Wakanda to warrant Wakanda's full attention. Killmonger was different because of his legit claim to the throne of Wakanda and the loyalties of Wakandans. If not for this? T'Challa would not have dealt with inner conflict and turmoil, and therefore would never have lost to Killmonger. In fact? Killmonger would have never been able to breach the borders of Wakanda at all, as W'kabi and The Border Tribe are the Clan who brought Killmonger to The Golden City. Doom? Is a genuine threat to the F4, SHIELD, The Hulk, and many others..but Doom to Wakanda? Doom is clearly a megalomaniacal Colonizer and would be treated accordingly. Doom would be killed by Wakanda.
Doom should be part of The F4 series of movies, and Reed and T'Challa should be introduced via some kind of F4+Avengers mashup vs Big Bad Guy Who/Whatever. At this point? Maybe it could be revealed that T'Chaka knew Reed's or Sue Storm's father, or whatever. If somehow or other Doom DOES find himself part of BP 2? He shouldn't be the main focus. Maybe Doom should vanish from the movie after he uses the Vibranium he pilfers from Klaue's body to resurrect Klaue via use of Klaue's vibranium arm cannon, and transform Klaue into The Murderous Master of Sound. Maybe Doom would be part of the primary Phase 4 Big Bad Plan. Like how Hela was the main villain for most of Thor Ragnarok, but not the main villain of Phase 3 [ who was Thanos ].
Some quick MCU Wakanda thoughts:
The X-Men's MCU profile should bring in Magneto, and with this? We now have a very sensible, formidable and definitely fan favorite trio of villains whom we could/should bring to Wakanda: Klaue. Magneto. And Doom. I was inclined toward BOTH Dooms [ Krystoff and Victor ], thus setting up The Royal Family of Wakanda vs The Royal Family of Latveria... but I'm sure that Marvel will want a younger Doom and therefore Kyrstoff isn't on deck yet. But imo this trio should best be developed in the cartoon treatment of BP, not in the actual movie franchises of BP.
Namor should be Marvel's Aquaman, and as such? His intro movie and character development won't set him up as an antagonist of/for Wakanda. However, the shared histories and conflicts between Atlantis and Wakanda should be part of Namor's trilogy...if Namor truly does get a trilogy, as I expect that he will.
Ramonda must play a decisive, action packed role in the defeat of Wakanda's villains in all media platforms [ comics, cartoons and movies ]; imo she was criminally underused in BP 1 [ however much I really understand and approve of the need to develop Shuri, Nakia, and Okoye with T'Challa ].
I would actually prefer to see a blend of an approach which develops the BP specific Rogues' Gallery, ties BP to the larger MCU as a whole, launches BP mythos based properties in comics and in cartoons, AND plants seeds for other heroes [ and sheroes ] of color that will be stars of their own movies in Phase 4 in ways that we wouldn't see coming; in the way that we see with the White heroes of the MCU.
Imagine Ukumkani Wabafileyo...the Xhosa phrase from the Xhosa language of MCU Wakanda meaning "The King of the Dead", whose SHIELD Codename is MACABRE [ thus giving the nod to Don MacGregor and Gil Kane who created 616 Baron Macabre for BP's Rogues Gallery, while still giving the badly need Afrakan centered transformation and upgrade in power etc that is required for a premier foe of the BPs and/or Wakanda ]. This would tie Wakanda more into its magical heritage, could very clearly involve The Jabari [ as the lineage of the Ukumkani Wabafileyo has a legacy of being both a ally to and enemy of the Royals of the Tribes of Wakanda ] and could attract Chiwetel Ejiofor's Baron Mordo to Wakanda, thus providing a surprising MCU DOCTOR STRANGE tie in. The corruption of the current Ukumkani Wabafileyo could unveil Wakanda's long planted countermeasures, one of which provides the intro to and throughline for both Doctor Voodoo AND Blade to come into the MCU Phase 4 plans. The many mystical, human and animal threats of the Ukumkani Wabafileyo would definitely justify the need for the skills of Falcon, War Machine and Bucky The White Wolf, but that might not happen because we already have the Disney streaming platform launching the FALCON AND BUCKY franchise. In their absence? The Dora Milaje should shine...and I'd like to see The Hatut Zeraze [ "Izinja Zemfazwe" in Xhosa, "Dogs of War" ] introduced into the MCU and reintroduced in the 616 as the formidable fighting force they are. I think that the Dora should remain all female, whereas the Hatut Zeraze could and should be of both primary genders.
Vibranium would most definitely attract Magneto to Wakanda, and Storm would race to Afrika both to protect her mother's land of Kenya and to battle Magneto. We should embrace this reality as this spins out soooo many options for BP the Franchise to continue to grow in soooo many different ways and simultaneously with the successes of other franchises, without being harmed by or tied to the failure of said franchises [ should they fail ]. This would be very very interesting indeed, and would give us the opportunity to reconcile the T'Challa-Nakia-Storm thing. I very much favor a reconciliation which doesn't diminish any of the 3 main characters of this potential triangle. All 3 could be friends, while allowing Storm to develop and follow her own character story arc as the leading Black Afrikan female mutant which COULD lead to the throne of Wakanda. Nakia could be allowed to develop on her own as a character in a female James Bond+Jason Bourne kind of way; she could have arcs and miniseries in comics, cartoons and even both guest and feature in the MCU properties on Disney's streaming platform. In this way we show unity rather than disunity and powerfully develop all 3 characters without having fallen into the false and destructive dichotomy and either/or that White society tries to compel us into making,as if we can't support multiple Afrikan heroes at once in the same wholehearted way that we can support mostly White heroes like the entire Avengers and JLA rosters at the same time. We can and do love the ENTIRE Bat Family AND Spider-Verse at the SAME TIME, without any conflict or tension. Same thing should be done with Wakanda and our s/heroes of color.
Wakanda will also be involved in whatever unforeseen mayhem caused by the battles and villains of GotG 3 and The Eternals trilogy. I think that The Inhumans might rise in Phase 4, and if they do? Wakanda would be involved in that, too. But neither Maximus or Doom by themselves are sufficient threats to Wakanda to survive jousting with the homeland of The Black Panther. Courting conflict with Wakanda is courting death...and these brilliant villains are smart enough to see and accept this. "SEE WAKANDA AND DIE".
This is why Doomwar shouldn't happen in the MCU BP trilogy. In the MCU? Doomwar diminishes Wakanda.
However. Once TurnCoates is thrown off of BP? We DEFINITELY should have a REAL BP scribe revisit Doom and Doomwar in the 616 and have T'Challa finally score that decisive whoop ass victory over Doom and from that point forward change the tone of their interactions. T'Challa should be seen as having a clear advantage over Doom in all their clashes henceforth.
EDIT; I ACTUALLY HAVE SOMETHING POSITIVE TO SAY ABOUT TURNCOATES' INTERGALACTIC WAKANDA THING. COATES TRANSLATES T'CHALLA'S NAME, AND I ACTUALLY LOVE IT. ONE OF THE THINGS I WOULD DO AS T'CHALLA'S MAIN WRITER [ WERE I EVER GIVEN THE CHANCE ] AND IN MY FANFIC WAS GIVE T'CHALLA A FAMILY NAME; A SURNAME. WHICH I WOULD INSIST BE PERMANENTLY INTEGRATED INTO THE CHARACTER'S BACKGROUND. COATES? ACTUALLY PUT A SWEET SPIN ON ALL THE FOREGOING WITH THIS HERE:

When T'Challa faces Doom again? T'Challa will again "...place the knife where it belonged...". This also gives us a character beat wherein T'Challa should imo become the absolute best "street level" knife fighter in 616 and the MCU. T'Challa, uberprep, supreme shrewdness, supreme spirituality and tech, claws, super senses, supreme skills with knives [ which by extension includes spears and swords ]. T'Challa...in typical fashion...keeps these skills under wraps until it's appropriate for him to reveal them, thus preventing his foes from prepping for his skills ahead of time.
I like it.
What do my fellow HEFfas think?