I kind of expected Chewie to show up (counting down to the "HOW DARE THEY" in 3 . . . 2 . . . 1 . . .) after Filoni's comments at CV. Hopefully they handle him well. That's very odd that Peter Mayhew recorded some dialogue; I wonder if they'll use any, or if it was just a temp track.
I do think they're getting ahead of themselves as far as reveals go. We knew about Qui-Gon before the Nightsisters trilogy was done, we knew about Tarkin before the Mortis trilogy was done, and now we know about Chewie before the Tarkin trilogy has even begun! Slow it down!