Avengers: Doomsday risks being overstuffed with too many characters from different teams and movies. Marvel should focus on a set Avengers lineup to maintain the importance of the team. Less is more in the Marvel Cinematic Universe - a smaller cast can lead to tighter scripts and stronger character development.

Chris Hemsworth was one of the most notable names to be announced for Avengers: Doomsday, as Thor is set to return to the Marvel Cinematic Universe once again. He's one of the most iconic characters in the franchise at this point, but Thor is also someone who Marvel Studios might consider developing in this film.

Robert Downey Jr. returns to the MCU with other confirmed actors including stars Chris Hemsworth and Tom Hiddleston, 'X-Men' stars like Patrick Stewart and Ian McKellen, and a good chunk from the studio's 'Thunderbolts.