MAJOR SPOILERS HERE
I don't see how they are keeping him in the Avengers if he had his chest plate removed which was his power source and all. Sure, they can have him invent another power source, but that would require decent writing and Pepper to not do what all superhero wives do. Just too much forced retconning for the next avengers movie really. And they can't have it set as a prequel because all of his problems are as a result of his trip into the wormhole (again, would've been an excuse to infect him with Extremis and fix his mental problems, but NOOOO).
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yeah. I'm a bit of a nerd for this stuff. so, eh.