i don't think they would use chris again straight after seeing him in .5..
they usually try to vary the characters around abit, so we can see a different face each time.
plus he's now on his 3rd game, i think they would give someone else a try, although they would make a good team.
i don't wanna see leon again, seeing him in 4 ruined it..
perhaps someone new?
someone who has some connection to the story/characters in some way..