Well if you're going to go to all the trouble of doing a flyweight tournament, you might as well put the finals on the main event of a major pay-per-view (PPV).

That's the plan Ultimate Fighting Championship (UFC) just revealed last night on its website. Indeed, Demetrious Johnson and Joseph Benavidez will hook 'em up as the headlining attraction at UFC 152 on Sept. 22, 2012, in Toronto, Ontario, Canada.

With the winner becoming the first ever UFC flyweight champion.

The tournament began in March in Australia, where Benavidez laid waste to Yasuhiro Urushitani with a second round TKO that earned him "Knockout of the Night" honors.

On the same card, the Demetrious Johnson vs. Ian McCall semifinal bout didn't go as smoothly.

After three tough rounds of back-and-forth action, Johnson was announced as the winner of a unanimous decision to advance to take on Benavidez later in the year. However, at the post-fight press conference, UFC President Dana White dropped a bombshell telling reporters an error was made on the scorecards and the fight was actually a draw.

Had that been known before the decision was read, there would have been a sudden victory fourth round.

Instead, Johnson and McCall met a couple months later. This time, Johnson's decision victory stood and the finals are finally set.

Joseph Benavidez vs Demetrious Johnson for the 125-pound title, Maniacs. Who ya got?

UFC 152 will be headlined by the aforementioned Benavidez vs. Johnson flyweight tournament final bout but will also feature a co-main event pitting Michael Bisping vs. Brian Stann and a welterweight war between B.J. Penn and rising star Rory MacDonald.

As always, stay tuned to MMAmania.com for more on this still-developing fight card.