Paul Heyman claimed last week that if Brock Lesnar lost his Universal Championship at SummerSlam, Lesnar and Heyman would both leave WWE.
Interestingly though, Brock Lesnar is currently being advertised for the following post-SummerSlam shows:
September 24 – WWE No Mercy PPV
September 30 – Live event in Winnipeg
That could obviously change, but it often is pretty accurate.