The Avengers 2 (2015) - All But Confirmed Will Have Scarlet Witch And Quicksilver

Entertainment Weekly got the following from Kevin Feige:

The Marvel Studios chief Feige spills new details about the stories, and dispels some of the false rumors about what’s in the pipeline.

Some online rumors turn out to be true, however. A source confirms to EW that the twin characters Quicksilver and Scarlet Witch will be joining The Avengers 2, which Whedon hinted at recently when he said he was writing a brother-sister duo into the movie. Feige maintains a poker face on that scoop, saying only: “I’m not confirming or denying. The draft could change six months from now.”