The names mentioned are Nick Diaz, Joey Villasenor, Brett Rogers and Rafael Cavalcante. No opponents have been confirmed for these fighters. Robbie Lawler has been mentioned as a possible opponent for Villasenor, although this is far from being signed. If Villasenor is successful in his fight, he will likely get a shot at the title. The same is true for Rafael "Feijao" Cavalcante, who will be in line for the organisation's first ever Light Heavyweight title if he wins in November.
Brett Rogers was expected to fight Kimbo Slice, but that fight has instead been given to Ken Shamrock ( see here for original story: http://mmatrivia.blogspot.com/2008/08/kimbo-to-face-ken-shamrock.html). Diaz was expected to face KJ Noons at this event, but Noon's management rejected the fight, claiming that the fight made no sense for Noons as Diaz wasn't a contender for his belt at the time. We will bring you news of the opponents for these fighters when we learn them.