Tatame.com has the story:

According to Sensei Sportv's blog, Nogueira's manager confirmed that the Brazilian, Antonio Rodrigo Nogueira (32-5-1 MMA, 3-1 UFC) set for UFC 108 will face the undefeated heavyweight Cain Velasquez (7-0 MMA, 5-0 UFC) at UFC 108, which takes place at January 2.

Rumored card so far:
- Brock Lesnar vs. Shane Carwin
- Cain Velasquez vs. Antonio Rodrigo Nogueira
- Rashad Evans vs. Thiago Silva
- Junior Dos Santos vs. Gabriel Gonzaga
- Carlos Condit vs. Paul Daley
- Tyson Griffin vs. Jim Miller
- Martin Kampmann vs. Rory Markham
- Joe Lauzon vs. Sam Stout
- Dan Lauzon vs. Cole Miller
- Ryan Jensen vs. Mark Munoz
- Jake Ellenberger vs. Mike Pyle