When the first set pics from Iron Man 3 leaked on the net, everyone (including us) thought that red-white-and-blue Iron Man armor spotted on the set was Iron Patriot. According to Latino Review, it isn’t. Their sources tell them that the guy in the suit was a stuntman, and the patriotic suit is actually just War Machine.
It seems with the US having the suit for a while they decided to give it a more fitting paint scheme for a military tool, but if this is true I wonder how comic fans will react. War Machine has had the same color scheme for a long time now, and they probably wouldn’t do this in the comics due to the existence of Iron Patriot. Maybe this is Marvel Studios’ way of merging the two characters?