Tom Cruise revealed the official title of Mission Impossible 6 via his newly-created Instagram account:

(Click on the picture to enlarge.)

Plot synopsis:
“he best intentions often come back to haunt you. MISSION: IMPOSSIBLE – FALLOUT finds Ethan Hunt (Tom Cruise) and his IMF team (Alec Baldwin, Simon Pegg, Ving Rhames) along with some familiar allies (Rebecca Ferguson, Michelle Monaghan) in a race against time after a mission gone wrong. Henry Cavill, Angela Bassett, and Vanessa Kirby also join the dynamic cast with filmmaker Christopher McQuarrie returning to the helm.”

Yep the film is officially titled Mission Impossible Fallout. The Actor also shared a new stunt picture:

(Click on the picture to enlarge.)

The Airbus logo is clearly visible. I guess they will appreciate the publicity.

The movie Mission Impossible 6 Fallout will hit theaters on July 27, 2018.
:)