I'm not sure if there will even be another Smash Bros. When I was reading the Iwata Asks: Super Smash Bros. Brawl article on Wii.com, Sakurai said that Melee was meant to be the last Smash Bros., which is why they made the graphics so good for that game. Seeing how Brawl is superior than Melee, I'm not sure if there will be another Smash Bros. game. If there is, it will probably be on the next Nintendo console which probably won't be for another 4-5 years or so. It could happen, but I'm not too sure right now.