2012 was the year of cards falling through. While you can't prevent injuries, I do think you can put measures in place to keep cards from falling through. In the future, I think it would be best to have a alternate on the card for every main event. For instance, the upcoming GSP/Diaz fight is co-headlined by Condit/MacDonald and Hendricks/Ellenberger. If GSP or Diaz have to pull out, any combination of the fighters can be put in the same slot. The co-main even should always be 2 fighters from the same weight class who are in line for a shot. The contract can be written that they are willing to move to the main event if need be and the guy with the bigger win streak would get the nod. Even if you had a main event fall apart, you have the next best guy in line. If that guy pulls out, the 3rd best is ready. What say you Sherdog? Would this be the way to go or is it more fun to have random fights thrown together like Belfort/Jones?