"Flags of Our Fathers" should be an animated film produced by Marvel in conjunction with Mr. Reggie.
I can see it being produced for DTV, but who knows, hopefully there could be a one-weekend theatrical release like what was done for
Batman The Killing Joke.
It's got Black Panther, who of course is on a fan-awareness hot streak since the
Civil War movie came out. It's got Captain America, so that appeal should speak for itself.
Having Gabe Jones get to be animated for the first time (and of course, he's the POV character) would be a hoot. (Or is that a howl?)

Depending on how many minutes the narrative was adapted to, there could even be additional material that wasn't in the original mini-series.
It would be great to see all the combat with Panther, Cap, and Nick Fury's Howling Commandos against the Red Skull's troops.
Who knows who the voice talent could be- but could it be possible for Mr. Boseman and Mr. Evans to reprise their roles? Hmm..