| Source: EGM
Alt. Source: GamePro, and others
|Source: Sonic 2 Beta ROM|
Some obvious oddities in the left screenshot include:
The oddest of all is the incorrect screen size, which is consistent with preview M01 and M03 since they appear to be from the same source.
Again, the life icon is displaced even the Score/Time/Rings does align perfectly.
The picture was created by Sega, by manually putting the zone tiles and sprites together, and was not captured within a playable game.
So, it's believed to be a mock-up.