no

And if there was, you certainly wouldn't be hearing about it here!

Any new officially licensed animated series would almost assuredly be associated with the games.

probably if they made a new sonic adventure and a year later theyd make another sonic cartoon

We had a new Sonic Adventure last year, actually. Except the powers that be called it Sonic The Hedgehog to capitalize on the "reinvention" theme they were going with.

But in reality, it was Sonic Adventure 3: The Search For More Money.