They should license their likeness and put them in. Hell, they should have done the same for Marvel's Avengers. I'm looking at these video game characters and there is some form of disjoint especially when I've always seen the movie adaptations. I find it difficult to separate Robert Downey Jr from Iron Man, Chris Evans from Captain America, Ryan Reynolds from Deadpool, Hugh Jackman from Wolverine, Patrick Stewart from Xavier, and Ian McKellan from Magneto, they are their characters. License their likeness like they do in Star Wars.