Brock Lesnar is currently scheduled for the August 13 Raw, SummerSlam on August 19 and the Raw the following night on August 20.
He is publicly advertised for the latter two events, but not the August 13 Raw, but Dave Meltzer is reporting that he is booked for that show. Lesnar is not currently scheduled for this Monday’s Raw.
These three appearances are expected to be Lesnar’s final WWE appearances for now if he decides to leave for the UFC. He has, of course, done the angle for UFC to set up a fight against Daniel Cormier, and he has re-entered the USADA testing pool, so all signs point to him leaving, but of course, anything can happen and Vince McMahon has a lot of money to throw around these days, so Lesnar leaving isn’t a 100% lock.
Lesnar losing the title at SummerSlam also isn’t a lock, since he’s scheduled for Raw the next night. And even then, who knows…