A look at one of the returning modes today, Sakurai talks about some of the details of the Smash staple classic mode:
After each battle, the fighters that lost get blown away!! The fighters remaining on the field will once again team up with other fighters on the field. You can actually choose fighters you’ve blown away to join your team in team battles. A rival will always appear in this mode, and the longer that character survives, the stronger it will get.