Originally Posted by cherokeesam
Pepper Potts is only a support character in the Iron Man mythos, though. War Machine became more than that, and a bona fide superhero with an actual membership card in the Avengers (Westies, anyway). Rhodey makes canonical sense in an Avengers flick; Pepper Potts doesn't.
My point was, I think it's unlikely we'll see any supporting characters from the solo movies in A2, which is what the OP was asking for. Maybe somewhere down the line, though.