I think they should have a new main character, seeing as Ash took a step back in his pokemon skills with this new series. He lost his first match in the fifth region to a guy who had just gotten his first pokemon!!!People still like Ash and still find the Anime entertaining despite this though. So they're still making some good money off of him. It would also not make much sense if they just randomly replaced him with an all new character after 650+ episodes. I know other Anime do this as well but I in my opinion and the opinions of many others; it kind of kills the story line to randomly change the main character, They can't just end it either because of how popular it is, too many people would get upset and there would probably be a huge riot. Therefore, they have to continue and with Ash. It's been making them money and working for them, please don't try and fix what is not broken. Even though he lost against Trip, which doesn't make much sense, it's still a pretty good Anime and entertaining to watch.