Re: Avengers 2 News, Rumors, Etc. Pictures until release...
Heh, that would be kinda cool. I remember Spiderman wanted to include Iron Man references, but ran out of time. I think they would be better off keeping it vague in the Avengers to avoid too much of a backstory (they could call them a genetic mutant or something like that, but no need to drag Magneto into it). Then they appear in DOFP as Magneto's children and those who see both get the whole backstory.
I think the bigger problem would be convincing the actors to want to work for two different studios.
When on Romulus, Do as the Romulans