Executive Meddling: The staff were pushed to create Dulcy so as the balance out the gender ratio of the Freedom Fighters. The four Antoine shorts were also a request of executives.
Fake Frenchman: Antoine, as voiced by Rob Paulsen. His character is a collection of insulting French stereotypes: mispronouncing so many words of English, misspeaking famous quotes, always scared, especially clumsy, constantly getting captured, obsessing with fine cooking and cleanliness, enving the hero and quick to surrender.
What Could Have Been: The show's third season was completely laid out and prepared, and then ABC cancelled it.
Knuckles would have appeared in the third season.
Had SatAM not been cancelled, Naugus would have taken over as Big Bad of the series.
According to the series bible, Nate Morgan from the Archie comics was originally supposed to appear in the show. Also, Snivley's original name was Quizley, and he was Robotnik's second cousin twice removed on his mother's side rather than his nephew.
Some very early prototype designs were recently uncovered. Sally was a human at one stage, Bunnie was drawn like a Disney character and organic from the waist up (or mechanical from the head down, in another sketch), and Robotnik, as a likely result of having no visual references, was drawn as both a cyborg-pirate thing, and then a green demon overlord that looked kindof like Ganondorf if he was drawn by Don Bluth.
What Could Have Been: This was one of many attempts at making a SatAM game revolving around stealth rather than speed. The closest these elements ever got to being included in a finished Sonic game was Sonic 3D Blast, which excised all of the SATAM elements and ended up being a Flickyrevival, and Sonic Spinball, which relegates the SATAM cast to cameos in a mini game.