Description
Green Hill Zone was the first stage in the Sonic the Edgehog game (1991) for Sega Megadrive and Sega Master System. It had loops, slopes and a large dimension (perfectly fitted for Sonic's speed).
Green Hill Zone in SSBB
In a recent trailer, Sonic the Hedghog was seen running in Green Hill Zone from the Sonic (universe). It similiar to the 3D model that was used for Sonic Adventure 2: Battle. It appears to be a stage as seen in leaked screenshots. It has not been confirmed by Nintendo.
External Links
Super Smash Bros. Brawl Intro, it can be seen at 0:43-0:46 Screenshots