Re: The #4 movie - which movie series will have it first?
DOFP presents a really interesting query. Trying to label something that brings together sequel, spinoff and prequel elements all at once is silly. I wouldn't call it X-Men 4 by any means, though.
I think the most explicit answer will be Iron Man 4 circa 2016-2017. I have no idea who/what will be in it... will Downey take an extra film before his contract expires with Avengers 3? Will they put the focus on Rhodey Iron Man 2.0 style? We shall see.