The idea is growing on me, but the key is to keep the majority of "gun guys" away. There is no need for a Nathan Hale or the Killzone main character. A helghast level would be awesome, but I don't think a character is needed
Gun characters only work when they have a huge zany list of abilities like Snake.
But I'm warming to the rest, basically you need characters who can present a unique moveset for the game.
First party "must-haves"
Nathan Drake - great melee moveset in UC3
Kratos - no need to explain
Ratchet - huge arsenal, probably the best possible character potential
Clank - also has a lot of abilities
Jak - big moveset, has very unique movements
Cole - already in a fighting game
Sweet tooth - very distinctive
Parrappa - punch, kick, its all in the mind
Sly Cooper
Third party "must-haves"
Solid Snake - no explanation needed
Raiden - ""
Crash Bandicoot - once the Playstation mascot, deserves a spot
Spyro - another one-time mascot
Altier - could have an interesting moveset
Big Daddy - would make for an awesome character
Dante - great character
Maybes:
Daxter - could be plain fun for the character he would add
ICO / Wander or boy + Toriko - small potential moveset. Toriko could add alot
Sackboy - distinctive but I can't see a moveset
Ape Escape - kinda just runs around panicking
3rd party maybes:
Lara Croft - don't see a good moveset, but would be fun against Drake
Tekken, Street Fighter, Final Fantasy, Ryu Hyubasa characters - all have competing fighters so I'm not holding much hope
Stages/special moves:
A Helghan level
A level in Shadow of the Colossus
A special attack using patapons
Demon's Souls area?
If they are creative enough they can make any sort of character work
Anyway I'm still apprehensive about the quality of a fighter from a Western start up developer