In my AU (FNAS: SHPP) Origin Sonic never gets possessed by eggman. Which means that shadow sonic isn't eggman but Origin's agony and regret after the bite of 91. Because of this, Shadow Sonic is frowning and all Golden Sonic variants are the same exact person. Shadow Sonic is the only variant that frowns because he tried to kill eggman with basically himself (golden sonics) but failed. This also means Nightmare Golden Sonic (in my AU " '28 Origin Sonic") never stabbed salvage sonic, leading to Nightmare Sonic not being created and the toymare not having salvage sonic inside it (that doesn't mean Toymare doesn't try and kill Luigi). That also gets rid of Phantom Salvage Sonic as a character. So salvage sonic is basically replacing nightmare sonic. The reason Origin tries to kill Knuckles (first game) Amy (second) and Sonic, the real one (third) and Luigi (fourth) is because he's insane after biting eggman.

Nutshell: No eggman possession, no salvage sonic dying, no corpse in toymare, no nightmare sonic, no phantom salvage sonic, frowning shadow sonic.

And by the way, I'm only making the 2 games (FNAS: SHPP one and two) but I could makes models for the other games if you want ;)