This just came down the line, according to MMA Weekly:

An injury has forced Vitor Belfort out of his UFC 122 main event fight against Yushin Okami in Germany. In to replace Belfort will be Nate Marquardt, who just picked up a TKO win over Rousimar Palhares at UFC Fight Night 22.

Marquardt's placement in the fight was confirmed to MMAWeekly.com by sources close to the bout, who stated the fight has been signed for the new main event at UFC 122.

I'm a skeptic by nature. I never believe what's presented to me. Perhaps it's due to my association and longtime love of the pro wrestling business. Maybe it's due to my near complete lack of faith in human beings to be honest. Either way, the timing of this undisclosed injury is entirely too convenient. Sonnen gets popped for steroids and will likely face a year long suspension. Anderson Silva is without an opponent. He is rumored to be coming back for the big Super Bowl weekend card. They've been trying to set up a fight between Belfort and Silva since he came into the UFC. The fight with Okami was billed as a number one contenders bout, so why would they want Vitor out and Nate in?

There are two reasons for this and it's all speculation at this point due to his injury not being made available. One, Okami represented a very bad matchup for Belfort and the very real possibility that he would win and down goes the fight they wanted to make. Two, Marquardt makes sense to fill in and he represents the perfect foil to Okami. He's got a well balanced attack and that's likely to win him the fight and down goes the guy that drew flies in his one main event appearance.

Call me a conspiracy theorist but this doesn't smell right. Of course, if Belfort has a broken leg or something along those lines, I'll look like an idiot.

UPDATE - Dana White confirms on his Twitter that Vitor Belfort is in fact, NOT injured, and will be fighting Anderson Silva for the title:

"Vitor is not injured. He is going to fight anderson for the title and the winner of marquart and okami are next."

Glad they came out and did it this way. I'm happy at this outcome as well. I never thought Sonnen should have been given an immediate rematch as it is. Although it is interesting to note that Sonnen won't be getting the title shot because he was busted for steroids and the man taking his place has been busted for steroids in the past.