Here are all the actors and characters from Marvel's "Thunderbolts*" who are going to return in "Avengers: Doomsday."

Avengers: Doosmday's cast announcement includes one hero who has a huge chance of betraying the others and joining Robert Downey Jr.'s Doctor Doom.

With the US government looking to impeach her as CIA Director, Valentina explains to her assistant Mel that they need to tie up any loose ends. That includes, it turns out, tricking each of her shadow operatives – Yelena Belova, John Walker, Ava Starr, and Taskmaster – into taking each other out.