This past Monday, it was announced that Brock Lesnar signed a new contract with WWE after shocking the world at WrestleMania and retaining the WWE Universal title.
According to Dave Meltzer on the latest edition of Wrestling Observer Radio, the agreement for a new deal was made at the go-home episode of RAW and was signed on Sunday before the match. It's a new contract, not an extension of his existing deal, and is at a higher rate. Meltzer noted that it's not known if the new deal is a one-match contract or for more than that.
The agreement was kept quiet and only several people knew about it. Meltzer stated that Roman Reigns found out about it on the day of WrestleMania and had thought he would be winning the title from Lesnar up until that point. The original ending was supposed to have Reigns coming off the ropes and get put into an F5, however he would counter it into a spear and pin Lesnar to win the match. It was changed to Lesnar hitting the F5 and beating Reigns.
The match went off as planned, and nobody went off-script.