You think so? Well... maybe is like Rayman Rush, M, revolution... and all the Rayman games that have no number. In fact... The tittle is Rayman Raving Rabbids, no Rayman 4. But it's true that there are new enemies, and Ubisoft put new enemies only when it was a really new number name. Except with RM, that apeared hunchman 1000 and Tily.