I could be wrong, and I KNOW Sheriff will correct me if I am, but I think he said two things will remain constant: The banner logo for the website, no matter how many versions of DI come out, will remain the same and that ranks will remain Toy Story themed.
Edit: Yeah, in this thread in reply to will there be any non toy story themed characters the answer was "no":
viewtopic.php?p=105937#p105937