This Saturday’s Metamoris VI has been a puzzle for fans and media alike.

While the grappling event will be available via online pay-per-view as usual, there will be no fans or media watching live. In fact, the location of the event has never been officially revealed. (It’s thought to take place at the Gracie Academy in Torrence, CA.)

This, after Metamoris founder Ralek Gracie drew the ire of fans earlier in the year when he fumbled through questions about the lack of female competitors at the event.

Now, there’s another twist.

Josh Barnett, the former UFC heavyweight champion, was scheduled to compete against Roberto “Cyborg” Abreu at Metamoris VI, but the Brazilian jiu-jitsu specialist Abreu has been forced to pull out of the event due to injury.

His replacement is a familiar face for Metamoris: Ryron Gracie.

Ryron, 33, is Ralek’s oldest brother — and while he’s known more for his recent work in his family’s jiu-jitsu instructional videos (including the popular Gracie Breakdown series), he also has a competition record of his own.

His most famous appearance was at the first Metamoris event, where he held Andre Galvao, one of the most decorated Brazilian jiu-jitsu competitors in history, to a draw.

Barnett, 37, competes at about 252 pounds in MMA; so will likely have about a 60 pound weight advantage over Ryron among his advantages.  He has recently split his time between pro wrestling and MMA, and is also filming a movie this year. He describes his grappling style, which is heavily influenced by the likes of Matt Hume and Billy Robinson, as catch wrestling.

In his last Metamoris match, Barnett defeated Dean Lister by scarf-hold (kesa gatame) and was named the promotion’s heavyweight champion.

Here’s the full lineup, scheduled to begin 6 pm ET / 3 pm PT:

Jeff Monson vs. Road to Metamoris champion
Clark Gracie vs. Roberto Satoshi
Alexandre Ribeiro vs. Keenan Cornelius
Joe Lauzon vs. Dillon Danis
Chael Sonnen vs. Renato “Babalu” Sobral
Josh Barnett vs. Ryron Gracie

For more information, check out Metamoris official site.