It's hard to say because there are so many to choose from.
I'd really like Crash, seeing as he's the reason I got my first video game system of my own. I have a special connection with the original Crash series, but we all know Activison is a bunch of bumholes.
So let's see... I wouldn't count on Cloud either (what everyone is saying). Maybe Abe from Oddworld? Tomba? Or another character to be put in for advertising for an upcoming release? Maybe they'll add in the guy (can't remember his name) from the Last of Us? --- "May the glistening chrome of the Borg Queen shed her light upon us all"
Probably more first party characters or characters from games they already have rights to. Another rep from God of War seems pretty likely --- If you believe in the Flying Spaghetti Monster, and are 100% proud of it, put this as your sig If it is past 10, expect a steep drop in my grammar skills