I have sources as to whos in. Go to imdb.com and search playstation allstars battle royale, and you can see some of the voice actors who are in. In case your too lazy to go here they are:
Sir Daniel Fortesque - MediEvil
Raiden - Metal Gear Solid
Spyro - Spyro the Dragon
Spike - Ape Escape
Ratchet and Clank - Rachet and Clank
Nariko - Heavenly Sword
Crash - Crash Bandicoot
This list might not be all of the characters because imdb might not have the page updated yet or the character might not have a voice (i.e.. sackboy). Bentley, Murray, and Captain Qwark are non-playable characters. And finally some of these characters might be non-playable as well, but I think it would be stupid not to be able to play as ALL of them.
Did you know manbearpig is in All-Stars according to you?
Anyone can edit that list...
PlayStation All-Stars "Best In The World!"