For one thing, why does Letty teaming up with Shaw hold any significance to Cipher?
If I’m understanding this correctly, Diesel is saying that Cipher wasn’t aware of the group until Fast & Furious 6 when an amnesiac Letty (Michelle Rodriguez) was working with Owen Shaw (Luke Evans).
Somehow that put the group on her radar and she’s been watching them ever since.
Am I just way over thinking this and it doesn’t matter at all because who needs a plot when cars are fighting a submarine?