Rebels: 17 Ships
X-Wing: Opening and Closing S-foils. Core Set comes with Luke/Red Five paint scheme while standard expansion comes with usual Red Squadron paint scheme.
Y-Wing: Completely new mold with better paint scheme.
A-Wing: I'd imagine same mold and paint scheme unless they wanted to change the mold to fit Rebels or to give it a Phoenix Squadron paint scheme.
Falcon: Likely same mold and paint scheme, though they might use the TFA mold and change the antenna dish to be round.
B-Wing: They might use same mold with different paint, or if they could get it to work maybe some kind of rotating action that opens and closes the wings?
HWK-290: I'd imagine same mold and paint scheme unless someone decided that the HWK is bigger now and they move it to a medium base.
E-Wing: Same mold with possibly slightly altered scheme unless it shows up in Resistance with a new look.
Z-95: Likely same mold but maybe with red squadron markings instead of blue.
YT-2400: I imagine they might swap it out with the Rebels version for the mold.
K-Wing: Likely same mold aside from new pegand paint scheme unless anything changes between now and its release.
Ghost: Same mold and paint scheme unless they make the Phantoms able to actually dock with the rear.
Phantom: i'd imagine the same paint scheme and mold unless they actually modify the Ghost to be able to dock the Phantom and Phantom II into it.
Arc-170: If the trailer is anything to go by looks the same aside from the new peg. Maybe opening and closing s-foils but that would probably be really fiddly.
Sabine's Tie: Likely the same since the base Tie mold still looks the same.
U-Wing: Same mold but with new peg, probably same or similar paint scheme.
Auzituck Gunship: I'd imagine same mold and paint job.
Phantom II: Same mold and paint scheme.
Imperial: 14 Ships
Tie Fighter: Looks to be same mold but in Imperial Blue rather than white.
Tie Advanced: Looks to be same mold but in Imperial Blue rather than white.
Tie Interceptor: Likely same mold and still Imperial Blue.
Tie Bomber: Likely same mold and still Imperial Blue.
Lambda Shuttle: Same mold, hopefully with slightly better hinged wings (I have one of the first run and they don't go all the way down).
Tie Phantom: Same mold and still Imperial Blue.
Tie Defender: Possibly new Rebels mold but Imperial Blue.
VT-49 Decimator: Likely same mold and scheme.
Tie Punisher: Aside from new peg likely same mold and scheme.
Tie Advanced Prototype: Possibly hinged wings to open and close though likely same mold and either still Imperial white or painted blue to match the others.
Tie Striker: Same mold and still Imperial Blue.
Tie Aggressor: Same mold and still Imperial Blue.
Alpha Class Starwing (GUNBOAT!): Same mold and still likely Imperial grey, maybe with foldable wings like the Lambda.
Tie Reaper: Aside from new peg likely same mold and still Imperial Blue.
Scum: 15 Ships
Firespray: Same mold but with brighter green to make it more screen accurate.
Fang Fighter: New mold with pivoting wings and slightly altered paint scheme.
Z-95: Likely same mold with a similar paint scheme, unless we see scum Z-95s in Resistance and they go with a paint scheme from that.
Y-Wing: New Rebel mold with either the existing Scum paint scheme or a new one.
HWK-290: Same mold unless the Rebel version changes, though if released as a seperate expansion likely will get a more scum/interesting paint scheme.
Starviper: Likely same mold and slightly enhanced paint scheme. Would be neat if they gave it opening and closing wings, would certainly help store it.
M3-A Interceptor/Scyk: Likely same mold and original paint scheme.
IG-2000: New medium peg but same paint scheme and mold.
YV-666: Likely same mold and original paint scheme.
Kihraxz Fighter: Likely same mold with possibly same or new paint job.
G-1A Starfighter: Same mold aside from new larger peg and likely same scheme.
Shadow Caster: Likely same mold and paint scheme.
Quadjumper: Likely same mold and paint scheme.
Scurrg: Likely same mold and paint scheme.
Kimogila: Likely same mold aside from larger peg with same paint scheme.
Resistance: 3 Ships
T-70 X-Wing: Possibly opening and closing S-foils but otherwise likely same mold and general blue squadron paint scheme.
Falcon (TFA): Likely same mold with same paint scheme, possibly without the engine thrust bit from the Aces expansion.
Resistance Bomber: Likely a new more screen accurate mold possibly in blue instead of red depending on if ST seems to use more Blue Squadron than Red Squadron decaled ships. Current, Film. Possibly moved to a medium base.
First Order: 4 Ships
Tie/FO: Likely same mold and paint scheme.
Tie/SF: Likely same mold and paint scheme.
Upsilon Shuttle: Likely same mold and paint scheme.
Tie Silencer: Already announced that it would get a new smaller mold to be more in line with the film, likely fixing the error with its rear. Current vs Film. Likely same paint scheme.
What molds or paint schemes does everyone else think or hope will change in 2.0?