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Speculation has, predictably, run rampant over the past 18 hours or so. Given the swirling information, my educated guess has these fighters most likely to appear in the show's main event, in order of likelihood: Frank Mir, Alistair Overeem, Brock Lesnar, Tito Ortiz, Rich Franklin, Dan Henderson, Mauricio Rua.
Mir has been linked in rumors to both Alistair Overeem and Brock Lesnar, and seems like a virtual lock at this point. All signs point to Overeem having signed with the UFC, even if he will not appear on the Fox show. Lesnar rumors have resurfaced, though Dana White penciled him in for a 2012 return. Tito Ortiz and Rich Franklin would be an OK, if uninspired, co-main, and an atrocious choice to head the card. Dan Henderson, according to various Twitter reports, has yet to sign with the UFC, while Mauricio Rua's camp claims they wouldn't be ready for a November date.
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