I hope she isn't a centerpiece, but they could bring her in for a finale or a big ratings boost.
LOL, big ratings boost. It isn't a live action TV show, it wouldn't be like a real celebrity guest appearance from an actor who got big and moved on from the show to do bigger things. I doubt having Ashoka make an appearance on the new show would bring any sort of boost.
For some reason I've been kind of excited about this new animated series announcement. I think the main reason is I feel like Disney is actually doing something right and looking at the market. George kind of did his own thing, regardless of whether or not it was the most marketable. I for one have never had any interest in the Clone Wars series, but if it had been a Star Wars cartoon featuring things I've had nostalgia for since being a kid, like X-Wings, Tie Fighters, and other familiar things from the OT, I would have been all over it. I think there is a large currently untapped base out there that feels much like I do.
Sure, kids relate to the silly Clone Wars stuff and have a lot of fun with it, but I think they relate to the OT era just as well, and the OT era stuff has a much larger base of interest. While you have plenty of fans who can't stand the prequel stuff, I've never heard of too many fans who only like the prequel stuff and can't get behind anything from the Rebel v. Empire stories. There is a lot more goodwill associated with it, and it has a long enduring fanbase. George has forced the market to stay in the PT era by only providing new PT material. I think Disney recognizes the goldmine that is classic Star Wars.