1. Guardians of the Galaxy
This is probably the one that people want to see the most, and with Iron Man recently joining the Guardians of the Galaxy in the comics (and the movie set for next summer), it seems the most likely. Stark would then be the link that brings the Avengers together with the Guardians in any future movies, most likely in a bid to defeat Thanos. A first appearance for the cosmic bunch of misfits would surely get tongues wagging. We all want to see, in particular, how Groot and Rocket Raccoon are going to look. And with Chris Pratt having been cast as Star-Lord already, maybe they got him just in time to fit him in to a scene filmed for Iron Man 3 at the last minute. I can see them turning up at Stark Tower, much in the same way that Tony himself turned up to speak to General Ross or the way in which Fury turned up to speak to Tony in previous movies, to have Iron Man join their galactic cause.
Who would you like to see make an after-the-credits appearance in Iron Man 3?Please use the comments box to tell me!