Here is the list of speculated sets:
75198 Tatooine Battle Pack
75199 General Grievous Combat Speeder (also includes Mace Windu minifigure)
75208 Yoda’s Hut (includes R2-D2, Luke and Yoda)
75533 Boba Fett (Constraction)
75534 Darth Vader (Constraction)
Additionally, Sir Von Lego mentions that four more The Last Jedi sets will be released, as well as Jedi Battle Pack including Coleman Trebor (a character named after animator Rob Coleman, who for trivia fans also worked on the LEGO Batman Movie as animation director) and Ki-Adi-Mundi.
All of the information above should be treated with caution until officially confirmed.