it's not welcome if MILESTONE isn't being consulted, paid, isn't the entity controlling the property, etc. If they move ahead on using the property of another company without following their contractual obligations and the law, this is a trademark grab and there's nothing good about it. Period.
Trademarks must be defended. if the Milestone people aren't able to do so in a timely fashion, DC will take the ™ by default. It's why MARVEL can use CAPTAIN MARvEL while dc, who owns the original, must refer to him as SHAZAM or something like it on the covers.
Do not support it unless it is something MILESTONE says is okay.
Until and unless they do, this is a theft.
You're not helping Milestone by being supportive of it being exploited by the people who worked Dwayne over when he was alive. Either they do it right or they go to court.
Be on the right side of this.