Next Saturday night (1/28), UFC presents its second live event on the FOX network from Chicago, Illinois.

Champion CM Punk was scheduled to appear at the show and accompany Chael Sonnen to the octagon for his fight against Mark Munoz. That is – until WWE Chairman Vince McMahon stepped in.

The news of WWE’s champion appearing at a major UFC event the night before the Royal Rumble got a lot of people talking and was reportedly an arrangement set up between Punk and Sonnen themselves. Punk confirmed to on Friday that Vince squashed the appearance.

WWE is holding a Supershow live event from Evansville, IN that night, although Punk is not advertised for that show.

Next weekend’s UFC on FOX show will be headlined by Rashad Evans vs. Phil Davis, with Sonnen vs. Munoz serving as the show’s co-main event.

* CM PUNK’s Next Feud & Details on the UNDERTAKER’s WWE Return