*makes mental note to lock down editing on Bulbapedia on the 8th*
Whenever an announcement like this comes out, we always get people fighting with each other to get an article up, filled with unfounded speculation.
Speaking of unfounded speculation....my own money at this point would be on 6th Gen mainline games for the 3DS, coming out late 2013 for Japan, and probably around Easter in English speaking territories.
At this point, we are already overdue for seeing the first Pokémon titles on new hardware. I don't see it being likely that the first mainline game on a new console would be a remake, so it just seems more plausible that it'd be an entirely new gen.