Looking at the Pokemon Sunday video, in addition to the Gold and Silver balls used to make an announcement, at the end of the section, there also appear to be two posters on easels in the background that are blurred out (presumably of the to-be-announced games), with one appearing gold and the other silver:
http://www.filb.de/1042
So, things are definitely pointing towards G/S remakes. If for some reasons the colors turn out to just be misleading though, we do at least now know it's a pair of games, so that eliminates all the PBR 2 stuff and such as possibilities.
Edit: Here's a scrennshot of the posters: