More on Lesnar's Contract; Details on When it was Actually Agreed to and Signed
— According to Dave Meltzer on Wrestling Observer Radio, Brock Lesnar did not sign an extension on his current contract, but rather he signed a whole new deal at a “higher rate” than before. However, he was unsure if Lesnar’s new deal is for one match or if it’s for a longer period of time as some reports suggest. More will become clearer by the end of April.
— The plan to keep Lesnar around was made on the Monday before WrestleMania which is where Paul Heyman gave his line that neither he or Lesnar would ever be seen from again if Roman Reigns won the title. The actual contract wasn’t signed until Sunday, right before WrestleMania.