You mean GS remake. There is no proof leading to a Crystal remake. When Fire Red and Leaf Green were released people thought there was going to be a remake of Pokémon Yellow, but there wasn't. Pokémon games work in a strange way. They release two games that are practically alike in every way, and than in a year or so, release a third one. For example, Red + Blue = Yellow, Gold + Silver = Crystal, Ruby + Sapphire = Emerald, Diamond + Pearl = Platinum. Since they didn't make a third game for the Red and Green remakes, it's highly likely there will not be a third game for another remake. If that was just a mistype or something, I'm sorry.