I was at the Shaymin event on Sunday, and according to some of the other players there mentioned that there was a sequel "in the works" for this game. I want to know if NOJ has announced a sequel or these to were just spreading rumors.
Most likely they were guessing based on what's happened on the N64 and the Gamecube. N64 got Pokémon Stadium 1 and 2, the Gamecube got Pokémon Colosseum and Pokémon XD. So it makes logical sense that in a year or two Pokémon Battle Revolution will get a "sequel" rather in the same vein as it, but with added features. Possibly minigames which let you use your pokémon as competitors a la Stadium. Knowing Nintendo, they'll put a contest mode in and be done with it.