The idea behind putting only one fight on the show seems a little flawed to me, but I'm sure there is some sort of strategy behind it. Now, knowing that we only have one fight to show a largely uneducated audience what MMA has to offer, I think JDS vs Valasquez is a perfect fight to showcase this sport.
Two of the most well rounded, well conditioned, and heavy handed fighters in the game today are going to face off for the heavyweight title. While some might see Valasquez's wrestling as potential for a boring fight, I think it is much more likely to lead to an exciting fight that showcases mixed martial arts. People love stand up wars, but again, a large percentage of people will be seeing MMA for the first time, and we need a fight that differentiates MMA from other combat sports such as boxing.
Neither guy is known as a boring fighter, and I cant think of any of either of their fights that werent enjoyable. Cain vs Junior should be a badass showdown of some of the UFC's best boxing, wrestling, or jiu jitsu...maybe even all three! Saying this fight could destroy the UFC is a silly stretch to make. Worst case scenario it is a boring fight, in which case the first full two hour show should be on par with the quality of fights we have come to expect.