Lesnar, 36, is expected to have a major role in WWE's Wrestlemania XXX in April of next year.
After that, it's anyone's guess what his next move will be.
White wouldn't confirm or deny the rumors, but he had a grin on his face that suggested there was more to the story than what he was willing to reveal.
"Really?" White said when asked whether Lesnar (5-3 MMA, 4-3 UFC) was attending Saturday's UFC 168 in Las Vegas. "I don't know. I honestly don't know."
White was also asked point blank if Lesnar was returning to the UFC.
"Honestly," White told MMAjunkie. "I don't know."
Rumor has it that Lesnar will be meeting with UFC officials sometime this weekend, while he's in attendance for UFC 168 in Las Vegas, Nev.
If he does end up getting spotted in the crowd for UFC 168, then there's a good chance there's some truth to the story.
Lesnar, one of the biggest stars in UFC history, won the UFC heavyweight championship in Nov. 2008, and successfully defended it twice.
Lesnar lost the title in Oct. 2010, when he was finished by hard-hitting knockout ace Cain Velasquez.
Despite his iffy record, Lesnar was a fan favorite in the UFC. He only won four times inside the Octagon, but he definitely did his part to put fight fans in the seats and sell a whole lot of pay-per-views.
Lesnar headlined four pay-per-views that each broke the one million buy mark.
Lesnar's UFC career was impacted by two bouts with diverticulitis that led to surgery. He now appears to be back in great health, so there's no reason why he shouldn't be able to make another run at the UFC heavyweight title.