Here's my list: -Cole Macgrath (inFamous) -Kat (Gravity Daze) -Ratchet (Ratchet and Clank) -Dart (Legend of Dragoon) -Sackboy, he could be like Kirby in Smash Bros, grab enemies and get there costumes and moves.
It would be awesome to have third party characters like:
-Cloud (Final Fantasy VII) -Batman (Batman: Arkham City) -Rayman -Ezio (Assassin's Creed II) -Connor (Assassin's Creed III), could be very different from Ezio because he uses tomahawks and other Native american weapons. -Solid Snake (Metal Gear Solid) -Death (Darksiders)
Cole MacGrath, Nathan Drake, Sackboy, Nariko, Gabe Logan, Ratchet & Clank, Jak & Daxter, Journey Character, Cloud, Sephiroth, Snake, Cyborg Ninja, Dante, Chimera, Nathan Hale, Tomas Sevchenko, The Wanderer, Lara Croft, Sonic and alot more.
Skorpion and/or Sub-Zero - Mortal Kombat Ryu - Street Fighter Sackboy - LBP Sonic - Sonic the Hedgehog Alex Mercer and/or James Heller - Prototype 1&2 Cole MacGrath - Infamous Cloud and Sephiroth - FF7 Sora (and Mickey if they can get the rights) - Kingdom Hearts
and for the hell of it... though very unlikely Ichigo and Aizen - Bleach Naruto and Sasuke - Naruto Goku and Vegeta - DBZ