Aren't Crash and Spyro default PSN avatars? Wouldn't that mean Sony's already dealt with Activision on stuff like their exclusive likeness? I know that was a while ago, but still, they must have had their chats about them to get them as avatars.
Check out my movelists! Shadow the Hedgehog: http://community.us.playstation.com/t5/PlayStation-All-Stars-Battle/Shadow-the-Hedgehog-Moveset-Unlockables-etc/td-p/39693075