My idea

Dominic Toretto (Vin Diesel) and his team are called upon again by Mr. Nobody (Kurt Russell) to track down one of his former operatives (Boyd Holbrook) who had gone rogue years ago and is now co-operating with the team’s former enemy Cipher (Charlize Theron).

Locations: New York, Africa (so far)

Cast
Vin Diesel as Dominic Toretto
Dwayne Johnson as Luke Hobbs
Jason Statham as Deckard Shaw
Michelle Rodriguez as Letty Ortiz
Tyrese Gibson as Roman Pearce
Chris ‘Ludacris’ Bridges as Tej Parker
Scott Eastwood as Little Nobody
Nathalie Emmanuel as Ramsey
Boyd Holbrook as the main villain
Kurt Russell as Mr. Nobody
Charlize Theron as Cipher

Supporting cast
Jordana Brewster as Mia O’Conner (still try to figure how to put her in)
Luke Evans as Owen Shaw (returns to help)
Vanessa Kirby as Hattie Shaw (I heard that she’ll play the role in the Hobbs/Shaw spin-off, helps Dom and his crew)
Helen Mirren as Magdalene Shaw
Winston Duke as a villain
Sofia Boutella as a villain
Lewis Tan as a villain