Eh...I still believe from the Classic up to the Adventure Era would be enough characters. And if we want to throw in extra's? The "Dark Age" characters such as Silver and Blaze can even be in the show. I don't want non of the modern characters (In my mind those are joke characters such as the Deadly Six) due to how badly they are written these days, and I still would never like anything Satam/Archie related. Call it a bias I know, but I can't stand ANY of the Western Sonic media, save for IDW. And that's mainly because that comic series is based off the characters from the games only, and they are doing a better job at writing the characters these days than Sonic Team is.