Vergil would be an awesome addition but DLC characters come in two so who would be a good rival for him?
Snake. Cause we got Dante and Raiden, lets get second reps for the two who who deserve it.
Why does DMC deserve a second rep more than the others?
God of War - Kratos is really the only thing coming out of there. Twisted Metal: No other character popular enough. Parappa: Again who would be good enough? Fat Princess: See above Killzone: There's only so many ways to make shooter characters, but still a choice. Sly Cooper: Previous arguments stand Uncharted: Who else can they get that actually seems good? Infamous: we already have two versions of Cole that show off most of both Nix and Kuo's powers who are really the only other two who could potentially be seen. Ratchet and Clank: Again nobody else wildly significant in series. Jak and Daxter: see above Bioshock: BD is the only memorable character from that game although maybe a promo character from Infinite could be seen... Heavenly Sword: Most people didn't even know this game existed until now, and it's all about Nariko anyways. MGS: Snake, it's the hero that PSABR needs... Little Big Planet: Sackboy is the only character in it... Tekken: It would be nice to see another character, especially since Jin and kazuya were also big playstation reps in the PS1 and PS2 era MediEvil: I think it's a miracle Sir Dan even got into this game... Ape Quest: I think Specter would have been cool but really I can't see it happening. And Toro is... well Toro, Kuro is a minion already I doubt they'd make him his own character.
So out of most of the games already repped, DmC, Tekken, Metal Gear and maybe Killzone are really the only ones I can see getting another rep.