Robert Downey Jr. will be back as everyone's favorite canned ham, Tony Stark, in Iron Man 3 this summer and in Avengers 2 in 2015. And now fans believe he will also pop up in next year's Guardians of the Galaxy movie (a theory bolstered by a new storyline in the pages of Marvel Comics). Clearly, Downey's live-wire superhero is an essential dynamo for Marvel Studios but how long until Marvel's parent company, Disney, plugs him into live-action movies across the corporate portfolio? To help out (or, really, to make matters worse) we've come up with some playful suggestions...