I personally am going to wait for the Wii U version, since I really do not want to risk damaging my 3DS's circle pad playing it. And I'm way more accustomed to the Gamecube controller.
Also, what characters do you play? I main Captain Falcon, with my secondaries being Samus (Armored, not Zero Suit), Mario/Dr. Mario (Doc in Melee and soon SSB4), Ganondorf and Falco. I play Melee mostly, but the new game looks pretty good compared to Brawl. I'm interested in picking up Mega Man, and trying out Palutena. Looking forward to any newcomers?