According to BetUS.com:
Unnamed sources have confirmed that Frank Mir will fight Roy Nelson at UFC 130, which will take place on May 28th, 2011 at the MGM Grand Garden Arena.[UPDATE] MMA Junkie
A source close to the negotiations told MMAjunkie.com verbal agreements are in place for the heavyweight tilt.
An additional source said the contract issues that forced Nelson out of an early-year event aren't expected to be an issue.
Frank Mir (14-5)
Win Mirko Filipovic - KO (Knee) UFC 119
Loss Shane Carwin - KO (Punches) UFC 111
Win Cheick Kongo - Submission (Guillotine Choke) UFC 107
Roy "Big Country" 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
May 28th, live on Pay-per-view from Las Vegas, Nevada:
Frankie Edgar vs. Gray Maynard (source)
Frank Mir vs. Roy Nelson
Thiago Alves vs. Rick Story
Travis Browne vs. Stefan Struve
UFC 130 coverage