Lesnar returned to WWE on April 2, 2012, on Raw, as a heel, by confronting and delivering an F-5 to John Cena.
The following week on Raw, General Manager John Laurinaitis revealed that he signed Lesnar to bring "legitimacy" back to WWE and become the "new face of the WWE".
Laurinaitis also scheduled Lesnar to face Cena at Extreme Rules in an Extreme Rules match.
At Extreme Rules on April 29, Lesnar lost to Cena despite dominating the match.

The following night on Raw, WWE's Chief Operating Officer Triple H refused to give in to Lesnar's unreasonable contract demands (which included being given his own personal jet and having Raw renamed to Monday Night Raw Starring Brock Lesnar), resulting in Lesnar attacking him and breaking his arm with a kimura lock in storyline.
The next week on Raw, Paul Heyman turned as Lesnar's legal representative; he claimed that Lesnar was quitting WWE and was suing WWE for breach of contract.
At No Way Out in June, Triple H challenged Lesnar (who was not present) to a match at SummerSlam, which Lesnar refused.
Stephanie McMahon would later goad Heyman into accepting the match on Lesnar's behalf on July 23 at Raw 1000.
At SummerSlam on August 19, Lesnar defeated Triple H by submission after once again breaking his arm in storyline.
The following night on Raw, Lesnar declared himself the new "King of Kings" and said that he would depart from WWE after his victory over Triple H, stating that he had conquered everything in the company.

Lesnar returned on the January 28, 2013, episode of Raw, confronting Mr. McMahon who was about to fire Heyman, and despite Heyman's pleas, Lesnar attacked McMahon with an F-5, breaking McMahon's pelvis in storyline.
The following week during The Miz's Miz TV talk show, Raw Managing Supervisor Vickie Guerrero revealed herself as the one who signed Lesnar to a new contract to impress McMahon.
On the February 25 episode of Raw, Lesnar once again attempted to attack McMahon, only to get into a brawl with the returning Triple H, which resulted in Lesnar legitimately having his head split open and requiring eighteen stitches.
The following week on Raw, Triple H issued a challenge to Lesnar, requesting a rematch with him at WrestleMania 29, which Lesnar accepted but only after Triple H signed a contract and Lesnar named the stipulation.
After Triple H signed the contract and assaulted Heyman, the stipulation was revealed as No Holds Barred with Triple H's career on the line.
At WrestleMania 29 on April 7, Lesnar lost to Triple H after a Pedigree onto the steel steps.
On the April 15 episode of Raw, Lesnar attacked 3MB (Heath Slater, Drew McIntyre, and Jinder Mahal) before Heyman challenged Triple H to face Lesnar in a steel cage match at Extreme Rules, which Triple H accepted the following week.
At the event on May 19, after interference from Heyman, Lesnar defeated Triple H to end their feud.
Lesnar returned on the June 17 episode of Raw, attacking Heyman's fellow client CM Punk with an F-5.
Despite the accusations from Punk, Heyman claimed that he was not behind Lesnar's attack on him.
However, Heyman turned on Punk in July, and claimed that Punk could not beat Lesnar, which led to Lesnar making his return and attacking Punk on the July 15 episode of Raw.
The following week on Raw, Punk challenged Lesnar to a match at SummerSlam on August 18, where Lesnar defeated Punk in a no disqualification match.

On the December 30 episode of Raw, Lesnar returned with Heyman to challenge the winner of the upcoming WWE World Heavyweight Championship match between Randy Orton and John Cena at the Royal Rumble.
Lesnar then dared any wrestler who disapproved of that notion to challenge him, which was answered by Mark Henry.
The ensuing brawl ended with Lesnar delivering an F-5 to Henry.
The following week on Raw, Henry challenged Lesnar again, only to have Lesnar dislocate his elbow with the Kimura lock in storyline, which led Big Show to come out afterwards to confront Lesnar, thus starting a feud which was settled at the Royal Rumble on January 26, 2014, where Lesnar defeated Show afte
Lesnar returned to WWE on April 2, 2012, on Raw, as a heel, by confronting and delivering an F-5 to John Cena. The following week on Raw, General Manager John Laurinaitis revealed that he signed Lesnar to bring "legitimacy" back to WWE and become the "new face of the WWE". Laurinaitis also scheduled Lesnar to face Cena at Extreme Rules in an Extreme Rules match. At Extreme Rules on April 29, Lesnar lost to Cena despite dominating the match.
The following night on Raw, WWE's Chief Operating Officer Triple H refused to give in to Lesnar's unreasonable contract demands (which included being given his own personal jet and having Raw renamed to Monday Night Raw Starring Brock Lesnar), resulting in Lesnar attacking him and breaking his arm with a kimura lock in storyline. The next week on Raw, Paul Heyman turned as Lesnar's legal representative; he claimed that Lesnar was quitting WWE and was suing WWE for breach of contract. At No Way Out in June, Triple H challenged Lesnar (who was not present) to a match at SummerSlam, which Lesnar refused. Stephanie McMahon would later goad Heyman into accepting the match on Lesnar's behalf on July 23 at Raw 1000. At SummerSlam on August 19, Lesnar defeated Triple H by submission after once again breaking his arm in storyline. The following night on Raw, Lesnar declared himself the new "King of Kings" and said that he would depart from WWE after his victory over Triple H, stating that he had conquered everything in the company.
Lesnar returned on the January 28, 2013, episode of Raw, confronting Mr. McMahon who was about to fire Heyman, and despite Heyman's pleas, Lesnar attacked McMahon with an F-5, breaking McMahon's pelvis in storyline. The following week during The Miz's Miz TV talk show, Raw Managing Supervisor Vickie Guerrero revealed herself as the one who signed Lesnar to a new contract to impress McMahon. On the February 25 episode of Raw, Lesnar once again attempted to attack McMahon, only to get into a brawl with the returning Triple H, which resulted in Lesnar legitimately having his head split open and requiring eighteen stitches. The following week on Raw, Triple H issued a challenge to Lesnar, requesting a rematch with him at WrestleMania 29, which Lesnar accepted but only after Triple H signed a contract and Lesnar named the stipulation. After Triple H signed the contract and assaulted Heyman, the stipulation was revealed as No Holds Barred with Triple H's career on the line. At WrestleMania 29 on April 7, Lesnar lost to Triple H after a Pedigree onto the steel steps. On the April 15 episode of Raw, Lesnar attacked 3MB (Heath Slater, Drew McIntyre, and Jinder Mahal) before Heyman challenged Triple H to face Lesnar in a steel cage match at Extreme Rules, which Triple H accepted the following week. At the event on May 19, after interference from Heyman, Lesnar defeated Triple H to end their feud. Lesnar returned on the June 17 episode of Raw, attacking Heyman's fellow client CM Punk with an F-5. Despite the accusations from Punk, Heyman claimed that he was not behind Lesnar's attack on him. However, Heyman turned on Punk in July, and claimed that Punk could not beat Lesnar, which led to Lesnar making his return and attacking Punk on the July 15 episode of Raw. The following week on Raw, Punk challenged Lesnar to a match at SummerSlam on August 18, where Lesnar defeated Punk in a no disqualification match.
On the December 30 episode of Raw, Lesnar returned with Heyman to challenge the winner of the upcoming WWE World Heavyweight Championship match between Randy Orton and John Cena at the Royal Rumble. Lesnar then dared any wrestler who disapproved of that notion to challenge him, which was answered by Mark Henry. The ensuing brawl ended with Lesnar delivering an F-5 to Henry. The following week on Raw, Henry challenged Lesnar again, only to have Lesnar dislocate his elbow with the Kimura lock in storyline, which led Big Show to come out afterwards to confront Lesnar, thus starting a feud which was settled at the Royal Rumble on January 26, 2014, where Lesnar defeated Show afte
Brock Lesnar