I'm willing to bet that at least the Red/Gold pattern will be back by the time of "Avengers Age of Ultron". Marvel has a tendency to change-or revert-their heroes in order to help sell titles to those who have seen the movies. I think this kind of started with the X-men movie, where the X-men sported black leather which lasted a few years until Whedon's run put them back in the spandex.
I am not expecting that (or Captain America to revert to Steve Rogers or Mjolnir to return to Thor Odinson) by May. The reason is time; there's not enough publishing time between the launch of Captain America
, and Superior Iron Man
in September/October and Avengers: Age of Ultron
in May for more than a single story arc (by the standards of modern decompression) with the new takes on these characters. Why make a big media splash on the new Captain America and Thor if all you're going to get out of them is six to eight issues? (I have my issues with the way Marvel handled the reveal on both of those, but that's an issue for another time.)
The wild card, I suppose is "Time Runs Out" next spring. If that does reboot the Marvel Universe (as some think it will), then perhaps Marvel made those changes to Thor and Captain America precisely
because they were going to be reverted in short order, not unlike how Civil War
outed Peter Parker as Spider-Man because Marvel knew it was a short-term issue since "One More Day" was already in the planning stages.
I expect the Avengers Three will be back to their "iconic" selves by the time each of their next solo movies comes out, again, not unlike how Peter Parker was back as Spider-Man just before Amazing Spider-Man 2
came out. By next May, though? No way.