Dr. Narcisse
Veteran
I wish they just did a Disney + series of him "becoming Killmonger"Making Killmonger the Black Panther could have been its own movie and they fumbled that imo. The time Killmonger ruled over Wakanda felt like a couple days. Id be fine with Shuri as BP, but id go into the movie accepting that they are taking a step BACK and for story telling purposes would have to give her her first BIG challenge in the second BP film, which just slows everything down. Recast the role, Killmonger, and Shuri would all work. it just depends on what you are willing to sacrifice.
Killmonger would be the most fun for me, because he may not be inherently "good" all the time.... So we would get to watch someone morally grow in order to meet the standard of BP while still being somewhat of a savage.
Seeing him and Klaw put in work. Seeing how it was part of a long con/game for him. Also get flashbacks of his father.
Shuri would have to go Gal Gadot levels of weight training to look like a warrior.
Also to @Primetime 's point....we not only get more of the same but lose something with no T'Challa.
We get another quippy/inherently funny hero. I liked how Boseman was went against the norm. It actually allows for other characters to shine while Boseman helps ground the movie.
I do think they should have/need to make T'Challa more dynamic. However, his personality was perfect.