Brock Lesnar is in the midst of possibly the mostcontroversy he's experienced since becoming a household name in 2002.

While his return to in-ring action for WWE against Randy Orton is one of the most highly-anticipated WWE matches of the summer, his tarnished win againstMark Hunt atUFC 200 has everyone questioning Lesnar's integrity.

Having tested positive for an anti-estrogen drug, whatever hope MMA fans may have been holding on to for Lesnar's attempt at recapturing the UFC Heavyweight Championship has since vanished.

Instead, fans of Brock Lesnar look ahead to August 21 when he facesRandy Orton atSummerSlam 2016.

Announced shortly before his fightatUFC 200, the WWE has already been promoting this match for nearly a month. With Lesnar being selected byRaw in the WWE Draft and Orton being taken bySmackDown, Lesnar vs. Orton may be the only cross-promotional match on the card.

What follows is one part ina series of WWE SummerSlamhistory articles, in which we take a look at a WWE Superstar's recordat SummerSlamand see what their past experiences might tell us about that competitor atWWE SummerSlam2016 on August 21.

Win-loss record atWWE Battleground

When he shows up,SummerSlam is a big event for Brock Lesnar. In six prior appearances, Lesnar walked away with a victory four times. And of those six matches, four of them were the evening'smain event.

Overall, his record is 4-2. He went 1-1 during his first two appearances in 2002 and 2003.

Since returning to the annual event every year since 2012, he's gone 3-1.

WWE Battleground title matches

Half of Lesnar'sSummerSlam match-ups have been for the biggest title that WWE had to offer at the time (which, incidentally, was a different belt each time).

In 2002, Lesnar captured his firstWWE Undisputed Championship less than a year after he had debuted in WWE.

The following year, when he challenged for theWWE Championship without Paul Heyman at his side, he was unsuccessful.

Eleven years later, withPaul Heyman once again representing The Beast, he captured the WWE World Heavyweight Championship. He's never enteredSummerSlam as the champion, but he's 2-1 overall in title matches at WWE's biggest party of the summer.

Worthy competition atBattleground

Considering the fact that he's only competed atSummerSlam in six singles matches, it would be hard to come up with a more impressive list of opponents for any wrestler of the last 20 years.

The list of future WWE Hall of Fame inductees that have come toe-to-toe with The Beast Incarnate atSummerSlam includesThe Rock, Kurt Angle, Triple H,CM Punk, John Cena and The Undertaker.

Adding Randy Orton for 2016 only makes the accomplishment more impressive.

Predictions forBattleground2016

WhileSummerSlam 2016 will be more than four months since Lesnar's last WWE match atWrestleMania 32, it will be Randy Orton's first big matchin over nine months.

So it's a big return for two of the biggest names in WWE. Like every match that Lesnar has ever had atSummerSlam, it's a marquee match-up that could easily headline the event if Vince and company so choose.

It's a somewhat unusual pairing for such a big event, given the fact that the two have no real significant history together and haven't been feuding at all.

However, given Lesnar's history at the event and the value of his name inpop culture, it would seem likely that Brock will defeat Randy Orton atSummerSlam.

WWE SummerSlam2016airs live, exclusively on the WWE Network on August 21. SummerSlamwill be available to stream on-demand immediately via the WWE Network.

The SummerSlamKick-Off Show begins at 7/6c.

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