Absolutely no chance. Sonic X-Treme looked like a disastrous weird experiment at best and I'm pretty sure it was destined to be slammed by consumers and in reviews. I don't even think a good Sonic game could have altered the Saturn's fate. Even if Sonic Adventure had been released for it I still think it would have bombed. Sega was a mess at the time and made so many bad decisions with the Saturn (surprise early launch at E3, focus on 2D instead of 3D, the console being too complex to develop for, the list is endless) that I think Sonic wouldn't have made a substantial impact even with a good game let alone a bad one. Sonic could have helped sales yes, just like how Sonic Adventure propelled the Dreamcast out of the gate. But saving the Saturn from its demise? Doubtful.