Rebel Support Ships: HWK-290 and Y-Wing.
It'd make sense to group these guys. Both get turrets, both tend to be more on the support side with their abilities. Not sure where they'd get more HWK pilots, but I'm not as steeped in EU knowledge as others. New turrets, crew (with a Y-Wing Crew upgrade title), etc.
Imperial Support Ships: Advanced and Bomber.
Both are missile platforms. Perfect opportunity to give the Advanced a "Chardaan Refit" of its own. New Missile cards (and maybe a reprint of the Proton Rocket?), titles, etc.