When The Rock joined the Fast and the Furious franchise everyone was all like, "Huh? What's that dude doing here?"

Now we know.

Because these films make bajillions of money, it only makes sense that The Scorpion King would want in on some more sweet, sweet spin-off action. He recently spoke quasi-enthusiastically to Empire about the probability of a spin-off film starring his character, Luke Hobbs.
"Possibly... after this one. After the next one. Possibly. I'm not quite too sure. I know that's the goal, and we continue to build that character and have him take shape, form. But yes, can't wait."

So nothing set in stone yet. The makers of The Fast and the Furious want to get the character right first.