Worth noting that these characters largely contradict Paul Gale's rumors, as well as the supposed Kat screenshot and the David Hayter rumor.
Gale has said there is an RPG character, several female characters, and possibly an Assassin's Creed character.
Of course, Gale could be making things up again, like he did with TMNT/Rocksteady, Metroid x Star Fox, and the idea of James Bond being in this game.
Also, if this isn't the full roster, both could be right. Put Lightning, Kat, and Ezio/Conner in there and everything lines up (Snake, too, I guess, but I don't see Konami getting two characters).
I would be surprised if this were true, if only because the game would end up with 4+ third-party characters. That stuff doesn't come cheap.