10 Wrestlers Who Could Leave WWE After WrestleMania 34
2. Brock Lesnar

Paul Heyman might not be smiling so hard should Brock Lesnar leave WWE after WrestleMania 34. Lesnar is Heyman's meal ticket, and he's the kind of talent that's hard to move on from. WWE should know: they tried to diversify Heyman's latest run by saddling him with Curtis Axel (sorry to remind you of that).
Aside from CM Punk, there isn't one man Heyman has managed in WWE who has the star power of Brock. The current Universal Champion surely knows this himself, and he'll also be aware that he's financially set for life. In 2018, Brock Lesnar doesn't need to work for anyone. He certainly doesn't need to settle for playing second fiddle.
That'd be the case after Lesnar drops the title to Roman Reigns in New Orleans. This, along with the fact Brock still hasn't come to terms on an extension to his deal with WWE, leads one to believe that Lesnar will be gone ASAP.
If both parties are keen on a fresh contract, they're leaving it very late in the day.