The most likely names are AquaSapphire and MagmaRuby...these makes sense
also I'm hoping they come before the Unova3rdVersion... I'm just really excited and desperate already for the premise of a 3rd gen remake happening!
There may or may not be a Unova 3rd Version, I think Magoo once said they ended the BW line of games or something, but they are exploring future endeavors.
We never know though, but the remakes are still a strong possibility, along with the BW Wii game.