I guess it would be most of their first party stuff and a few 3rd party games.. I'm gonna make a list of 15 and try to use mainly first parties that i'd like.
1) Dart [Legend of Dragoon]
2) Kratos [God of War Series]
3) Jak (3 different appearances like Link in Brawl) [Jak series]
4) Rose [Legend of Dragoon]
5) Sly Cooper [Sly series]
6) Drake [Uncharted series]
7) Cole [inFamous]
8) Spike [Ape Escape]
9) Ratchet [Ratchet and Clank]
10) Jeniffer Tate [Primal]
11) Keats [Folklore]
12) Ellen [Folklore]
13) Sir Daniel Fortesque [MediEvil]
14) Jeanne [Jeanne d'Arc]
15) Arc [Arc the Lad]
SONY definatly has enough characters to do something like this, I just chose an easy fifteen and I think all of these guys/girls can work well. There's also the option of throwing in special creature like characters or smaller fighter if that's what you wanna call them [pikachu, Jigglypuff, kirby] like these guys:
1) Monkey [Ape Escape]
2) Sackboy/girl [LittleBigPlanet]
3) Echochrome Doll [Echochrome]
4) Daxter [Jak and Daxter]
5) Clank [Ratchet and Clank]
6) The locoroco.. blob thingy... [LocoRoco]
7) The patapon Warriors... Sorta like the Ice Climbers :S [Patapon]
8) A Lemming [Lemmings]
I could see something like this working out really well.
4 ≈ One
