Mmm, I see what you mean. I don't think you should replace anything to be honest with you. Just add 5 new levels, with Rayman's costumes on the goodie side, and types of Rabbids on the baddie side. Low down would be good, methinks. That would temporarily solve Pianoman's problem, because it would take 5 levels to reach betilla and space mama again. And you can always put a custom avatar on.