It definitely looks like the new armor, though. Considering Tony mentions nightmares and fears of not being able to protect Pepper, I'm guessing it's a dream sequence.
For anyone wondering about the red/white/blue armor, it's been pretty much confirmed as a War Machine redesign. The design comes from the Iron Patriot armor used by Norman Osborne/Green Goblin when he tricked his way into being in charge of a new version of S.H.I.E.L.D. called H.A.M.M.E.R., and there's no chance it's him. There were some early set pics of the armor with a guy inside that looked like James Badge Dale who plays Eric Slavin/Coldblood, but it was confirmed as a stuntman and Dale was filming another movie at the time.
The real head-scratcher is Mandarin's tattoo:
It's Captain America's shield with an anarchist 'A' symbol in the center instead of the star. I suspect this version of Mandarin will have past ties to SHIELD and/or the Super Soldier Program.