Copying the Ultimate Ninja Storm series makes the most sense when taking into account moves and abilities the Pokemon have. I hope it's not an NFC game, because then I won't buy it.
Have all 25, non-legendary, fully-evolved fighting Pokemon in the game - include Mega Mewtwo, Cobalion, Terrakion, Virizion, Keldeo, and Pirouette Meloetta as DLC.
"On my business card I am a corporate president. In my mind I am a game developer. But in my heart I am a gamer." - Satoru Iwata