It had been rumored for a while, but you never know for sure until you hear the official announcement. Today, we heard the official UFC 146 announcement. And the main event will see UFC heavyweight champion Junior dos Santos facing off with Alistair Overeem on May 26th. Here's the relevant part of the release:

The biggest heavyweight fight of 2012 will land at the MGM Grand Garden Arena in Las Vegas on Saturday, May 26th, as UFC heavyweight champion Junior dos Santos defends his title for the first time in the main event of UFC 146 against former Strikeforce and K-1 champion Alistair Overeem. Ticket information will be announced soon.

Dos Santos claimed the title by knocking out Cain Velasquez in just 69 seconds at the first UFC on Fox event last November. Overeem is coming a first-round TKO win over former UFC heavyweight champion Brock Lesnar at UFC 141 in December, and is riding a twelve-fight unbeaten streak. The bout had been expected for this card since UFC co-owner Lorenzo Fertitta mentioned it in a late-night twitter Q&A last month.

Here is the current card for the event:

Junior Dos Santos vs. Alistair Overeem
Edson Barboza vs. Evan Dunham
Dan Hardy vs. Duane Ludwig
Diego Brandao vs. Darren Elkins
C.B. Dollaway vs. Jason Miller
Shane Del Rosario vs. Gabriel Gonzaga
Kyle Kingsbury vs. Glover Teixeira
Paul Sass vs. Jacob Volkmann

SBN coverage of UFC 146: Dos Santos vs. Overeem