It was speculated that Rayman 3D might have been a Rayman 3 or Rayman Origins port. It would appear all guesses were pretty wrong though. This particular version has not been formally unveiled yet. So it is unknown what version the game is ported from yet. The N64 and Dreamcast versions were the original ones. Revolution contained new levels and some slightly redesigned levels and enhanced graphics. And the PS1 version contained downgraded and downscaled level designs. Hopefully the port is based either off the Dreamcast or PS2 versions as those contain higher resolution textures, higher polygon 3D models, and superior lighting effects.
Rayman 3D is among the games listed to release before E3. So it's fair to say the game will come out before June. No exact release date though. Please note that the images posted in the source below have been concluded to be photoshops. They are not an indication of how the game will look, so ignore them. [/p]