LAS VEGAS, NV - JULY 9: Brock Lesnar before his fight against Mark Hunt during the UFC 200 event at T-Mobile Arena on July 9, 2016 in Las Vegas, Nevada. (Photo by Rey Del Rio/Getty Images)

Brock Lesnar and former UFC champion laying groundwork for blockbuster showdown?

This would be huge.

Former UFC Champion and current WWE Universal Champion Brock Lesnar (5-3 MMA, 4-3 UFC) has been rumored to be making a return to the octagon and he may already have a potential super fight in the works.

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While it may just be speculation, there's a growing possibility of a potential heavyweight fight between Lesnar and former light heavyweight champion Jon "Bones" Jones (22-1 MMA, 16-1 UFC).

Jones, who will face Daniel Cormier (19-1 MMA, 8-1 UFC) at UFC 214 on Saturday for the title he was stripped of in April 2015, discussed the possibility of facing Lesnar during a UFC Facebook chat this week. The former champion said he'd be interested in the fight, but wasn't confident it would happen.

"He's a massive dude," Jones said. "It would be a massive draw, really big for the sport. It would be a great challenge; that's a big old boy.

"I doubt Brock Lesnar would take that fight, though. I definitely wouldn't try to wrestle with him the whole time. I'm not going to tell you what I would do."

Lesnar responded during an interview with APNews.com on Wednesday, claiming he'd accept the challenge.

"Would I fight Jon Jones? Anytime, anywhere," Lesnar said. "Right now, he should be worried about 'DC' on Saturday night."

Last week, Wrestling Observer Newsletter's Dave Meltzer reported last week that Lesnar had gotten back in the USADA testing pool for UFC.

According to Meltzer, speculation grew on Tuesday after rumors of Lesnar and real-life manager Paul Heyman attending the UFC offices during International Fight Week began to spread. There  were also rumors that he spoke about participating at the UFC event scheduled for November 4 at Madison Square Garden.

However, Lesnar's UFC future is still a matter of speculation as he remains under contract with WWE until April 2018 and is currently serving a one-year suspension for two failed drug tests for Hydroxy-Clomihpene.

Lesnar was suspended after a July 9th test turned out to be positive and his one-year suspension was frozen in mid-February, which means it still has five months remaining and the former champion won't be able to compete again until mid-December.

Lesnar announced his retirement after testing positive, which also meant he was out of the USADA testing pool.

According to Meltzer, the rumors of Lesnar and Heyman visiting UFC's offices were denied by sources, however, those within UFC did confirm interest in Lesnar making a return to the octagon.