I still have an unopened copy of the N64 version. Sounds like that is all I need since nothing new is added in this release.
I notice that Ubisoft loves to port old Rayman games onto new handhelds. The GBA got a port of Rayman 1. The DS got Rayman 2 which flopped due to the terrible touch screen controls. Now with the 3DS we get Rayman 2 again. Ironically I would have much rather had a re-release of Super Mario 64 DS with updated controls than this game.