Ignoring the DC characters the only guest characters are Kratos and Freddy Krueger. It is likely there would more in the next game but, would probably only have one console exclusive guest and mabye one multi-platform guests as well.
What characters would you want to see in the next?
What I would want to see:
-Chimera (Resistance) -Cole MacGrath (inFamouse) -Sir Daniel Fortesque (Medevil) -Nathan Drake (Uncharted)*
- X-Box 360
-Marcus Fenix (Gears of War) -Special Infected (Left 4 Dead) -John-117 (Halo)*
- Wii U (Presumed)
-Link (The Legend of Zelda) -Ganondorf (The Legend of Zelda) -Girahem (The Legend of Zelda) -Pit (Kid Icarus) -Samus Aren (Metroid)* -King Bowser Koopa (Super Mario Bros)** -Lucario (Pokemon)**
-Warrior of Light (Final Fantasy) -Spawn (Spawn) -Cassie Hack (Hack/Slash) -Jason Vorhees (Friday the 13th) -Micheal Myers (Halloween) -T-800 (Terminater) -Rayne (BloodRayne) -Bouncer (Bio-Shock) -Akuma (Street Fighter) -Ezio (Assasins Creed) -Ryu Hyabusa (Dead or Alive, Ninja Gaiden) -Christopher Raven (Raven's Cry) -Bayonetta (Bayonetta) -Dante (Devil May Cry) -Samanouska Akechi (Onimusha) -Third Overlord (Overlord) -Pyrimed Head (Silent Hill) -Nemesis (Resident Evil) -Yujta (Predator) -Lili (Tekken) -Afro (Afro Samurai) -Aya (OneChanbara) -Xenomorphe Warrior (Alien) -Poison (Final Fight, Street Fighter) -Galen Marek (Star Wars)*
- The * means has potential but, would require alot of work to make them fit
- The ** means it is a joke but would be awsome any way
- The Wii U guests I've listed and Sir Dan for PS3 can work but they would need to be darkend in tone to work
The suggestions are based on consoles and hand helds systems exclusivity not counting, PC, Mac I-pods, or Mobile phones versions. If I counted them then X-Box 360 has no exlusives as they are on all the PC, Mac and Mobile phones as well.