And it turns out, they actually did write a cameo for Big the Cat into the second Sonic the Hedgehog film... only for it to be a bit too grim to make it to the final cut. "In one draft of Sonic 2 ...

I’ll admit, “macabre” isn’t the first word that comes to mind when I think of Sonic ally Big the Cat, but I don’t ... cameo in the second Sonic the Hedgehog movie as relayed to IGN ...