WWE Universal Champion Brock Lesnar will not be working the WWE Payback pay-per-view event in San Jose on April 30th as he is not being advertised by the SAP Center or WWE. He is also not advertised for any RAW TV events leading up to the PPV event. He is also not advertised for the post-Payback RAW and will not be appearing on the May 8th RAW.
As noted, WWE is planning to have Reigns take on Lesnar in the main event of WrestleMania 34 in New Orleans next year.