From Sonic Retro
Magazine Preview #08 - Prototype Picture in Sonic 2 Manual
|Source: Sonic 2 Manual||Source: Sonic 2 Beta ROM||Source: Sonic 2 Beta 4 ROM|
There's a prototype screenshot right there in your Sonic 2 manual. Is it the same version as ours? No. The one in the manual had implemented the one/two player mode (or simply the menu), when our version hasn't.
This title screen appears in Sonic 2 Beta 4 though.