Well, considering that M15 and Keldeo, I think the next main series game is Gray/Grey, considering we can not rebattle Gym leaders and trainers around Unova. R/S Remake would come later on.
Currently playing Omega Ruby and Alpha Sapphire and waiting for the guidebook(s).
Currently own: X and Y, Black 2 and White 2, Black and White, Heart Gold and Soul Silver, Platinum, Diamond and Pearl, Super Pokemon Rumble, Ranger 3, Ranger 2, Mystery Dungeon Explorers of Time and Dragon Ball Z: Super Sonic Warriors. Guidebooks for Johto games, Unova games and Kalos games.
Own quite a number shinies, especially in Y thanks to Consecutive Fishing.
Own all 5 gen event legends in White 2, many came from my brother which I like to thank.