The seemingly inevitable showdown between the UFC’s longest running champion, Jose Aldo, and the promotion’s hottest rising star, Conor McGregor, been rumored for weeks — at different dates and locales around the world.

Among the contenders to serve as site for the highly anticipated bout: AT&T Stadium in Dallas, the home of the Dallas Cowboys. As we described here at Caged Insider, the facility has been configured for boxing in recent years — attracting crowds between 40,000 and 50,000 strong.

Croke Park, in McGregor’s native Dublin, Ireland, was another.

But when the bout was officially announced yesterday, at Yahoo! Sports by Kevin Iole, it was a more familiar locale: the UFC’s home base of Las Vegas, Nevada.

On December 12, UFC featherweight champion Jose Aldo will face interim featherweight champion Conor McGregor at MGM Grand Garden Arena.

McGregor has, surprisingly to some, opened as an almost two-to-one favorite to Aldo, who will have gone ten years undefeated at bell time:

No other bouts were announced for the show.

In fact, while it was rumored that the Aldo vs. McGregor event would be co-headlined by the third bout between Ronda Rousey and Miesha Tate — but according to UFC President Dana White, that’s not the case.

“That fight isn’t going to be on the [Aldo-McGregor] card, for sure,” White said. “If we were going to go to Dallas Cowboys Stadium, that’s another story, but the MGM really wanted the fight and they made a huge effort for it and they got it. And it works out better for us to be in Las Vegas.”