Both F4WOnline.com and PWInsider.com are reporting that Brock Lesnar is in negotiations with WWE to make a surprise appearance at Sunday’s WrestleMania XXVIII pay-per-view event at Sun Life Stadium in Miami, Florida. Negotiations are ongoing, but a source within the company says that there is a 50-50 chance that Lesnar will appear on the show.

The source went on to state that WWE wants Lesnar to appear and is hoping that a deal can be finalized within the next 24 hours.

Ultimate Fighting Championship President Dana White confirmed to F4WOnline.com that Lesnar is legally able to appear at WrestleMania on Sunday since he is no longer under contract to the organization. White was not aware if Lesnar was appearing on the show.

Lesnar left WWE in March 2004 to pursue a career in the National League Football, which was short-lived. Following a brief fling in New Japan Wrestling, he stepped away from the professional wrestling industry entirely in 2006 to pursue a career in mixed martial arts. He captured the UFC Heavyweight Championship from Randy Couture on November 15, 2008, then avenged his loss to Mir at UFC 100 to become the Undisputed Champion. He lost the strap two years later to Cain Velasquez at UFC 121. Lesnar announced his intentions to retire from mixed martial arts following a subsequent loss to Alistair Overeem in December, which prompted speculation of a return to WWE.

A writer for the Associated Press stated in his article on Dwayne “The Rock” Johnson that if WWE wants to squeeze another potential blockbuster buy rate out of The Most Electrifying Man In Sports Entertainment, the last man standing to get the headline match would be Lesnar.

“I’m not saying a thing,” said a laughing, grinning Johnson with his eyebrow raised after being asked about the possible encounter. “I didn’t say anything.”

*PHOTOS* of Edge with short hair