Next week's issue of Famitsu is said to have a 100 page Super Smash Bros. for 3DS supplement. It's due out on the 11th of September
Wow, no way that's not full roster. Or at least I hope so. Makes me hopeful for a smash direct this week to nip the famitsu info in the bud. Sakurai has been the arbiter of all major reveals, so if famitsu spills the bean, sakurai will have done so already.
That or it's a boring rehash of all the info we already know