I think SF sticks around. With the challengers series finding a permanant home in vegas I think Zuffa keeps it around albeit in a much different incarnation than we see it now. I think it becomes more of a breeding and grooming farm system. I think you will see the Challengers series move to a Fertitta owned Casino so they can reap all the rewards of ticket sales and use them to keep SF somewhat operational.
"If you get hit and it hurts hit him back you not knocked out yet."-Joe Doerksen
The Toxic Terrors (FFL)
Demetrious Johnson*Eduardo Dantas*Emanuel Newton*Will Brooks*Michael Page