According to MMA Junkie:
A light-heavyweight matchup between Krzysztof Soszynski and Anthony Perosh is targeted for UFC 131.
MMAjunkie.com (www.mmajunkie.com) today learned of the impending fight from sources close to the event, who said verbal agreements are in place with paperwork on the way.
Krzysztof “The Polish Experiment” Soszynski (25-11-1)
Win Goran Reljic – Decision (Unanimous) UFC 122
Loss Stephan Bonnar – TKO (Punches) UFC 116
Win Stephan Bonnar – TKO (Doctor Stoppage) UFC 110
Anthony “The Hippo” Perosh (11-6)
Win Tom Blackledge – Submission (Rear-Naked Choke) UFC 127
Loss Mirko Filipovic – TKO (Doctor Stoppage) UFC 110
Win Kym Robinson – TKO (Punches) Rize 3