User blog comment:TDWTfan1113/Confirmed Characters for Total Drama All Stars?/@comment-3222773-20130203164150

From what I saw on the script, it looks like it's this:

Heroic Hamsters: Cameron, Gwen, Lindsay, Mike, Sam, Sierra, and Zoey

Villainous Vultures: Alejandro, Courtney, Duncan, Heather, Jo, Lightning, and Scott

So 7 v 7, 14 contestants, maybe another final three.