So,
Rick Scott is running for senate in 2018, and we will have a messy republican primary for FL governor?
I highly doubt Scott will run in 2018; Florida GOP politics are planned out, as SJoyce noted, and I just don't see how Scott running for Senate would fit in with those plans.
I think Scott has a really high opinion of himself (Rumors of him looking at the Presidential race support this), and might just for Senate in 2018 regardless of what the Florida GOP wants.
It'd be funny if Scott ran for Senate and Bill Nelson ran for Governor. Probably the only way that Scott even gets that seat.