Quoted from docquest:
Anyone else think the callouts by the guy with an english accent sound like a poor mans Patrick Stewart?
The voice actor for the callouts is apparently the same actor who did the narration for SW clone wars series and maybe SW rebels (I've never seen that one). Not OT, which is disappointing, but I'm impressed Stern sprang for someone in the universe instead of in-house or the hillbilly voice actor.
If only they could have gotten Billy Dee Williams.