Black Panther is confirmed.
But yeah, I think at least...
1) "Defenders"
2) Black Widow
3) Citizen V (Thunderbolts?)
4) Death's Head
5) Punisher
6) Ghost Rider(s?)
7) Moon Knight
8) Silver Surfer
With a strong possibility for...
9) Winter Soldier (maybe unannounced but appearing in an already-announced title)
10) Secret Warriors? Quake, Mockingbird, Deathlok, etc. (maybe unannounced but appearing in Agents of SHIELD)
11) Solos for some/all Defenders, Jessica Jones, Hellcat, Iron Fist
12) Northstar (maybe unannounced but appearing in an already-announced title)
13) The Naughty X-Men aka Cyclops, Emma Frost, Havok, etc. (maybe unannounced but appearing in already-announced titles)
14) Runaways
15) Gamora (eventually...?)
Lol, at this point... I'll believe it when I see it.