If you think Eggman is old and anybody else who's given you trouble, come up with an idea for a new villian.

eggman being the only villian helps sega not have to think of new ones....thel blow a braincell if they doXD

I think we need Robotnik back. Oh wait...

I think Eggman should use Chaos Control and call his, uh, I think it's his grandpa, Ivo, back from the past to kill Sonic.

How about if SEGA added a villain that was the opposite to sonic, he was fairly slow, but INCREDIBLY, INCREDIBLY strong. And the majority of his voice actors didn't suck. Oh, oh! I've got it! How about Tidus from FF X! *shot

Eggman's nephew. He's urrrr... smart... I guess. You've seen him on TV and in the comics. Might as well put the guy in a game.

There will always be a supernatural villain waiting for Sonic... and robots.

Someone very cool that people preferred over Sonic. And that very same person would accuse Sonic of wrongdoings that THAT person did. Just like how people mistook Shadow's evils as Sonic.