I always thought the Twilight would appear in the "deluxe" vehicle assortment as well. I'm wondering about the future of that lineup as well, although lots of other stuff could always appear in the animation. There are a lot of OT vehicles that could fit the bill there (or close to it), but it doesn't seem real likely. It isn't often that OT ships see mass release at all anymore, heck the new AT-ST is even an exclusive. I'm hoping the rumored/confirmed Snowspeeder next year is a mass release though, as I'd like a few if done well.
As far as the "big" $100 assortment, I'm fine with the pace of one per year. I've seen the Turbo Tank a couple of times now, but have had to pass for the moment - but hopefully I'll be able to save up and get one before the year is up. If there was two again, like last year, forget about it. I do think there is the potential to get either an AT-AT or Slave 1 next year as the "big ship" though, and I'd be happy to pick up either one. Otherwise, it will be interesting to see what we get in this assortment as well. I think as long as they keep it at the $100 level (and not the $150 Falcon level) they can get fairly consistent sales around the holidays, so it might be something they would like to continue. A Tantive would be great, but I just don't see it happening (unless it gets a lot of action in the animated series).