Tokyo Game Show is about to go down in Japan, but Nintendo yesterday held a TGS Kickoff conference which brought with it a trailer of the 3DS version of Sonic Generations giving viewers a chance to see Green Hill, Mushroom Hill, and the Special Stage in motion. Listen to that Sonic Heroes Special Stage remix.

Pictures released also include glimpses of Casino Night Zone, additionally confirming that players will be challenged by Metal Sonic in a race to the death within the neon lit gambling city, a change from the console version which features the race in its famous Sonic CD setting, Stardust Speedway’s Bad Future.

For Americans, Sega confirmed that the tentative retail date of Nov. 1 is when the PS3 and 360 versions of the game will be arriving for consumption. The fate of the Nintendo 3DS title isn’t so clear, as it has been given a more ambiguous release of Late 2011.

With signs that the game isn’t quite complete in the trailer itself–Modern Sonic’s Mushroom Hill is still using a recording of the original zone’s music from Sonic & Knuckles and fans have noted that Classic Sonic brings up homing attack reticules–this isn’t terribly surprising, but a positive sign that Sega and DIMPS are working to make the portable version of the game more than just a quick cash in version.