They played this shyt perfectly.
This wasn't Kang it was Immortus?
Immortus - Wikipedia
So those complaining they didn't like Kang being all goofy, well it wasn't Kang, it was a version of him, a nicer version. That real Kang gonna be next level and then that Kang of him is going to be next level then the Kang that is part of Avengers - Iron Lad, is going to be next level. I think there will be like 5 versions of Kang across all the movies/shows and we won't even know what to do about it
Basically this shyt is now comic book fantasy and cinema fantasy. You can have any character come back and return under a new actor. In fact T'Challa could come back as a new face from other universe, as could Iron Man. Feige basically set up the next 30 years of Marvel. Any actor wants to leave, any character dies, there is always a way to bring them back or replace them. Plus the actual storylines we get will be more expansive then ever. Seems like Secret Wars will be the new Infinity Gauntlet.