Re: How will Iron Man return in the Avengers 2?
i think it is a fair assumption that tony's iron legion days are over.
he will likely focus on quality over quantity via making a single, totally badass, new suit.
maybe a combination of the mark 7 and the mark 42 (basically a mark 7 which can detach in parts)
or he could simply remake the mark 42 and get it working 100%, unlike in iron man 3 where it was still a prototype.
still, the mark 7 design is yet to be beaten imo.