It's not a theory but rather an opinion. I don't like the idea of 'V.' There are already so many characters but the more you add the more the old ones one wishes to see more of go by the wayside. I get the idea of adding new blood but they never really added much in the way of the old, and, no, I don't particularly care for DMC4's inclusion of those characters nor would I have them build up on the mechanics established there.