According to MMA Junkie:
The event was formally announced during today’s new “UFC Ultimate Insider” episode.
Top-ranked heavyweights Shane Carwin and Roy Nelson will meet in the co-main event of the New Year’s Day show.
Shane Carwin (12-1)
Loss Brock Lesnar – Submission (Arm-Triangle Choke) UFC 116
Win Frank Mir – KO (Punches) UFC 111
Win Gabriel Gonzaga – TKO (Punches) UFC 96
Roy Nelson (15-5)
Loss Junior dos Santos – Decision (Unanimous) UFC 117
Win Stefan Struve – TKO (Punches) UFC FN 21
Win Brendan Schaub – KO (Punch) TUF 10 Finale
Jan 1st, live on Pay-per-view from Las Vegas, Nevada:
– Frankie Edgar +125 vs. Gray Maynard -155 [LW title]
– Shane Carwin vs. Roy Nelson
– Clay Guida vs Takanori Gomi
– Chris Leben vs. Brian Stann
– Thiago Silva vs. Brandon Vera
– Nate Diaz vs. Dong Hyun Kim
– Phil Baroni vs. Brad Tavares
– Antonio McKee vs. Jacob Volkmann