Former UFC heavyweight champion Brock Lesnar has been rumored for a return to the Octagon for some time now.The current WWE Universal Champion has reigned as the title holder in the professional wrestling organization for over a year now. His last Octagon appearance came in 2016 at UFC 200 when he defeated Mark Hunt via unanimous decision.As we've previously noted, Lesnar is expected to make an appearance at the UFC 226 pay-per-view (PPV) in Las Vegas. It will be headlined by a heavyweight title fight between Stipe Miocic and Daniel Cormier.It's possible that The Beast challenges the winner for the heavyweight throne, and Lesnar confronts the victor after the fight.Another possibility is that Lesnar is announced for his next fight against Jon Jones, who called out Lesnar after his win over Cormier at UFC 215 last year. It's a dream fight mixed martial arts (MMA) fans have been expecting for quite some time.

What About WWE?

Lesnar is expected to drop his WWE title at the upcoming SummerSlam PPV later this year before making a return to MMA.

Before Lesnar can return to MMA, he must deliver six months worth of clean United States Anti-Doping Agency (USADA) drug tests.

Before leaving MMA in 2016 Lesnar failed a USADA test during his fight with Mark Hunt. As a result the win over Hunt was overturned to a No Contest and Lesnar was handed a suspension.

When Lesnar does decide to re-enter the USADA drug testing pool it will be recorded on the company's website. 

USADA

TSN's Aaron Bronsteter noted on Twitter that USADA is actually able to hide the identities of some UFC fighters who are being tested on their website.

This was noticed when USADA listed UFC signee Elias Garcia as "Contender 1" on their website after he was signed by the UFC in an un-aired episode of "Dana White's Lookin For A Fight." His name was hidden to prevent a spoiler of the result:

Damon Martin responded by reaching out to USADA and asking if Lesnar had re-entered the testing pool.

Apparently the company can't announce whether or not a retired fighter has re-entered the pool until the fighter has made the news official themselves:

What are your thoughts on USADA possibly hiding the fact that Lesnar has re-entered the drug testing pool? Do you think he'll announce his Octagon return at UFC 226? Let us know your thoughts on the matter in the comments section below!