Mh... I also want to throw in my character list. I tried to be reasonable
First Party:
PaRappa the Rapper series:
1) Parappa the Rapper
Killzone series:
2) Radec (alt. skin/clone = Sev?)
Twisted Metal series:
3) Sweet Tooth
Fat Princess games:
4) Fat Princess (pink and blue skins)
Sly series:
5) Sly Cooper
God of War series:
6) Kratos
7) Ares or Zeus
inFamous series:
8) Cole (good and evil versions)
Uncharted series:
9) Nathan Drake (alt. skin/clone = Sully and/or Elena)
Doko Demo Issyo / Toro games:
10) Toro (alt. skin/clone = Kuro)
MediEvil series:
11) Sir Daniel Fortesque
Heavenly Sword:
12) Nariko
Ratchet & Clank series:
13) Ratchet (&Clank?)
14) Dr. Nefarious
Jak and Daxter series:
15) Jak w/ Daxter
Primal:
16) Jennifer Tate
Resistance series:
17) Chimera (alt. skin/clone = Hale?)
Ape Escape series:
18) Spike
Syphon Filter series:
19) Gabe Logan
Shadow of the Colossus:
20) Wander
Crash Bandicoot series (if licensing works out):
21) Crash
Spyro series (if licensing works out):
22) Spyro (youngest version)
White Knight Chronicles series:
23) Leonard (alt. skin/clone = Black Knight)
LittleBigPlanet games:
24) Sackboy / Sackgirl (can mimic any of the other characters)
Third Party:
Metal Gear Solid series:
25) Solid Snake (alt. skin/clone = Old Snake and Big Boss)
Yakuza series:
26) Kazuma Kiryu
Final Fantasy games (if SE plays along):
27) Either Cloud or Squall or Tidus
Tekken series:
28) Either Jin or Kazuya or Heihachi
That's not even all possible franchises yet... I just can't imagine they will put in 30+ characters (not even counting clones). It's especially tricky if they want to put in a high amount of "real" villains as well (especially as many are not really suitable imo).
Stage-only franchises:
- Patapon
- Buzz
- Gran Turismo
- ICO
- Flow/Flower/Journey
- MotorStorm
- Siren
- echochrome
- Demon's Souls
- Wild Arms (could be playable, but hard to pick one stand-out character?)
and more... the mixed stages allow a lot of stuff to put in...
Do we know how they handle it when people want to choose the same characters? 4 different outfits? or just colors?