Obvious every other villain would be recorded, if not pulled straight from archive material. While some of the lesser known voice actors would be pretty happy to record new stuff, I doubt it. I just don't thi k with an 18 minute show, we can rule out the possibility of having tracks for everyone which would lower the cost by a fair amount. Assuming this is even a long-term thing. Then again who the hell knows, it'll probably stay for 15 years and decay.
If I'm wrong I will be very happy to be wrong because we have so much less live performance in Orlando then we did even 10 years ago, but I doubt it. And that's not coming from any source or anything, that's just my opinion based on what we have seen come out of entertainment for years and years here. Cost cutting after cost cutting...