Iron Man

While the first Iron Man film opened the MCU in a grandiose way and can be said to be one of the best superhero movies ever, the sequels were pretty disappointing. Quickly, name the villain of Iron Man 2!

See what we meant?

Furthermore, while Robert Downey Jr. is an awesome actor, one can actually get tired of his monotonous way of portraying the character. Still, he is indispensable for the whole Avengers team, which cannot be said about the next character.