User blog comment:LoveWaffle/We Didn't See It Coming - Iron Man 3 and the Future of the MCU/@comment-1713281-20130513193546/@comment-2031194-20130513222530

I'm sure everyone is going to be back because of contracts, even RDJ. Hopefully Ant-Man makes his first appearance in Avengers 2 before his own movie. Otherwise the only new addition I could see would be Falcon, as I don't think they'd include Iron Patriot (or War Machine), Bucky, any of Thor's friends, or the Guardians. Still hoping for the extremely small chance of Ms. Marvel.