CinemaBlend who was there live-blogging and Feige stated that Iron Man 3 would be the first step toward Avengers 2. Hopefully this will be done a little more quieter than in the second film which got it's story ruined by too many hints for upcoming films.
"We're in pre-production on a movie called Iron Man 3 right now. We've got a great director called Shane Black who's taking the reins. Iron Man 3 will be the first in what we're calling phase 2 that will hopefully results in an Avengers 2."