Wait a second! There can't be a new Sonic series, the continuation as far as the Sonic universe is mess up as it is now.
No more new characters, no more shtick, no more plot holes! Another Sonic show will be like another arc inside your favorite anime, it gets redundant and boring very quickly.
Another thing to be concern about, what the hell is the tone of the series going to use? Comedy, stick with comedy. Serious, I doubt a Sonic series can be good without the cheesy 90's liners. Drama, cancelled after five episodes not even that many.
Please just don't stop making that series into a reality, use the script inside the next Sonic game, not into a show.