I love how thrown together everything about this card is. Even the Sonnen-Bisping match which has been stable since the event was announced has a crazy backstory according to Chael.
Rampage was the original opponent, but he backed out because of issues with Viacom. I believe they announced he was going back to Bellator right around the time this event was announced
Randy Couture accepted the fight, but couldn't do it because he's filming a movie
Forrest Griffin was into it, but didn't think Zuffa would want him working for another company
Nick Diaz said he'd do it, but pulled a Nick Diaz and took too long to get back to them so they went to Bisping