I would second the imperial gunboat/missile boat and the YT-2400
I also would love to see some more Y Wing options BTL-A4 (exchange turret for cannon). "Longprobe" (exchange turret for sensor slot). Plenty more pilots
Tie Avenger is a great choice as are the new/old ships from Rebels (I too like ghost, though am not so sure about the ugly parasite fighter).
Also since they have mentioned the dune lizard in the rpg, if a third faction comes out, all fo the Mandal Motors fighters (dune lizard, syck. kimogila, krayt) would be great options.
The imperial customs frigate would be a good choice for the imperial huge ship or maybe that new ship at the begining of the SW:Rebels trailer that is dropping TIEs
I would love to see an E-9 Explorer, but that is really more an RPG vessel not suited to this game.