After Thor-Ragnarok:
Black Panther (2018)
Avengers: Infinity War (2018)
Ant-Man 2 (2018)
Captain Marvel (2019)
Untitled Avengers (2019)
Untitled Spider-Man sequel (2019)
Guardians of the Galaxy Vol. 3 (2020)
Other potential projects
Dr. Strange 2 perhaps, another Black Panther or two, Third Ant-Man and Spider-Man to wrap up those trilogies, after Ragnarok's success, they will be thinking of doing a fourth as well. Captain Marvel trilogy. By that time they will probably have enough cash in the bank to buy out or "share" Fantastic Four, Dr. Doom, Galactus, Wolverine etc., so there will be plenty more of these movies and another 20 movie setup for an Avenger versus Dr. Doom or Galactus movie.