Jason Momoa is currently in production on the tenth Fast & Furious film, and beyond the fact that we know he plays the bad guy in this one, we didn’t know a great deal about who the character really is.
That’s not a bad thing on its own, but it has made the villains largely interchangeable because they are so similar.
One assumes he has some connection to Charlize Theron’s Cipher, who has become the franchise’s big bad.
There’s likely a lot more to Momoa’s bad guy than just his toenails.