The latest rumors come from Stickmonkey on Warseer. Like always take with a grain of salt.
Thunder hawk is NOT likely
Codex based releases...
Dark eldar raven
Eldar night wing?
Non codex releases...
Csm hell blade
No necron release?
No SM release?
Suspected non codex releases will only be rules...models already FW...
Necrons may get something with their codex.
Raven/night wing likely to be combined kit.
So that's pretty limited, 3 kits and wd rules. But it sounds like it's in the typical wheelhouse. Probably disappointing news to many, but in light of some of the other speculation running I decided to put some info out.