The rumor mill is grinding away in regards to Avengers 2, specifically who’ll be added to the team and who might be returning.
Joss Whedon confirmed that brother/sister team Quicksilver and Scarlet Witch will be a part of Avengers 2, but he’s not saying how they fit into the bigger picture.
Per his interview with Eric Goldman of IGN:
“You know, they had a rough beginning. They’re interesting to me because they sort of represent the part of the world that wouldn’t necessarily agree with The Avengers. So they’re not there to make things easier. I’m not putting any characters in the movie that will make things easier.”
As to who may or may not be returning, there’s been talk that Robert Downey Jr. has been playing hardball with Marvel now that his contract with them is up for negotiation. Couple that with how things were left in Iron Man 3 and it might lead people to question whether Tony Stark will be back.
IRON MAN 3 SPOILERS AHEAD:
On that note, Joss had this to say:
“Well, I feel like in Iron Man 3, even though he said, ‘I’ve changed’ — he blew up his remote suits, but I don’t think anybody thinks he doesn’t have one anymore. The question is, if The Avengers are called, does he show up? And the answer is, ‘Yes!’”