So, I am new and have very few games played but I'm liking this game so far. I notice in the most wanted set there are cards to make Boba Fett and Slave I a Scum ship. The Sabine's TIE set has options for a Rebel flown TIE fighters, and a cool paint job. Are these the precedent for future expansions giving ship options? If so I guess the following:

Rebel Lambda Class Shuttle: Han Solo, Kanan Jarrus, Chewbacca, Captain Rex

Rebel Shadow Caster: Ketsu Onhu, Sabine Wren

Rebel Protectorate Starfighter: Fenn Rau, Mandalorian Rebel

Imperial Protectorate Starfighter: Gar Saxon, Super commando

Scum Lambda Class Shuttle: Hondo Ohnaka (with Melch crew)

I'm sure I'm missing plenty. I've seen the future ship posts and thought missing pilots/new ships for pilots would be interesting. R2-D2 would be a good pilot for X-Wings or maybe the Falcon. The Rebel shuttle pilots could come with Phantom II or a Rebel infiltrator pack with the shuttle from Rogue One.

Any other suggestions?

Well, the wording on Capture TIE would allow it to work with FO and SF fighters, If they were also made rebel. I'm not sure if it's a precedent on future waves, of course. The Rebel TIE is completely different in function than generally how Imperial TIEs act, it's a low-cost support ship which can fill a gap in a list with some utility, but being still 2/3/3/0 it's not exactly a serious fighter. Instead you use it's pilot or if equipped with Title it's upgrades. Rebel Lambda/Sentinel/Zeta would just do what those ships already do for empire, but for rebels, and would have high overlap with say, the U-Wing.

Also, no precedent on Imperial Protectorate - that was a Gauntlet transport in the rebels episode - similar but much larger.