Well, that didn't take very long.
According to the report, GSP vs. Nick Diaz are expected to be the main event for UFC 158 on March 16th in Montreal, Canada.
Early Call: GSP or Diaz?
GSP and Diaz were originally slated for a "champion vs. champion" superfight at UFC 137 in Las Vegas' Mandalay Bay Event Center over a year ago. However, Diaz was pulled from the fight after failing to arrive for press appearances.
After St-Pierre eventually dropped from the main event due to knee injury (followed by a severe ACL tear), Diaz defeated BJ Penn at UFC 137 as the replacement headliner.
Diaz went on to lose a controversial decision to Carlos Condit for the UFC interim welterweight title at UFC 143, snapping his 11-fight, three-year winning streak. Diaz was later handed a one-year suspension by the Nevada State Athletic Commission after testing positive for marijuana metabolites.
Meanwhile, St-Pierre successfully returned from a lengthy rehab period, defeating Condit in a title unification match at UFC 154, which also took place in Montreal.
Although it was assumed that No.1 contender Johny Hendricks would get the next title shot after his first-round knockout of Martin Kampmann, it's apparent that the grudge match between GSP and Diaz will put Hendricks on hold for a while.