Re: "Mr. Stark, you've become part of a bigger universe."
If you've seen his scene in The Incredible Hulk, he seems completely debriefed on what's going on at S.H.I.E.L.D. and his role in all of it. I think that IM2 will be a lot more advanced with complete integration of S.H.I.E.L.D.. I'm also confident that there will be more character references to other Avenger members, and possible cameos too.