My only regret about the apparent coming appearance of Thrawn in the Ahsoka series is that it almost guarantees we're never going to get a film version of the Zahn trilogy (which I admit I've somewhat given up on for years now).
In case anyone hasn't read it:
- although there's always the possibility of altering the end so Thrawn escapes instead of being assassinated. That would require some re-writing, maybe even cutting the entire subplot about the red guards' people and home planet, which would be a shame to lose, but if it got all the rest of in, I'd take it.