Universal Pictures

Is Vin Diesel journeying to Pandora? The "Fast and Furious" kingpin may be joining James Cameron's"Avatar" sequels.

In an Instagram video, Diesel and Cameron greeted fans from the set of the sequels.

"Ok, so here we are on the set of Avatar 2, 3, 4, and 5. This is top secret, this is like the Manhattan Project," Cameron says.

"[I'm] with my ol' buddy, Vin and we're actually gonna give him the flashy thing from Men in Black when he leaves here, so he has no memory whatsoever of what he's seen because he cannot carry the tale."

Diesel responds by gushing about Cameron as a director he has long wanted to work with.

"It’s long overdue. There is one person in Hollywood I’ve always wanted to work with, and learn from," he says. "All things come, I guess, to those who wait.

If Diesel is joining the cast, he'll work opposite returning "Avatar" stars Sam Worthington, Zoe Saldana, and Sigourney Weaver, as well as newcomers Kate Winslet and Edie Falco.

Then again, it's possible that Diesel and Cameron are just buddies and Diesel really is just there to observe the director at work. With so little known about the "Avatar" movies, it's anybody's guess.