So, any guesses yet? To me it looks like an ARC 170 on the cover, which opens up the chance for some Prequel ships. Plus, we have most of the iconic Rebel fighters already. So my guesses, in no particular order:
ARC 170 (it's pretty much a gimmee)
V Wing. Fluff tells us it was the precursor to the TIE, so for earlier campaigns it would be useful.
TIE Avenger (please please please)
The Gunboat from the TIE fighter pc game
The Scyk fighter, especially with the Scum and Villainy set coming for the miniatures game
Possibly the CSAs IRD fighters?
The Emperial Escort Carrier seems very likely, and possibly, in the carrier role, the Venator Star Destroyer. For the Rebels, the carrier from Truce at Bakura