So do the Voyager nacelles pivot or not?
No. No articulating or removable parts on any model. Mainly for the simple reason of the way the ships mount onto the stands. Each stand is made custom to each ship and therefore has a unique way that the ship fits into it, so if you change something with a movable part, it might throw off the weight balance of the ship. For instance the wings on the B'rel
-class Klingon Bird of Prey has its wings fixed in a straight out "flight" position instead of the downward slant that is "attack mode."
That said, the models I'm looking forward to the most are the ENT 22nd century-era ships. There will be the Klingon Raptor
-class (the one they saved from the gas giant), the D-5 battle cruiser, Goroth's ship, and the Bird of Prey
. There will also be the Romulan Bird of Prey
. Plus at least 3 Xindi ships, the Reptilian, Insectoid, and Aquatic