Sonic 3 - Lost Prototypes

A quick thanks goes to DarkWizardCD for acquiring and scanning the Sonic 3 preview image slides that are seen in this video.
This video is a look at all of the (as of writing) known instances of prototype versions of Sonic 3 that appeared in media and differ from the November 3rd 1993 prototype.
Sonic 3 Pre-final tape: • Sonic the Hedgehog 3 -...