I could definitely see the leaders of the Little 11 and the Big XII having a secret meeting in the Eagle's Nest, and trying to come up with a "super conference" taking the best schools from each respective group.
that would be interesting. but it is not about how good the team is, more importantly, it is about money and market share. UT is the biggest school in one of the most populated states. mizzou is in a huge market, so the big ten is interested in them even though they are not a perennial powerhouse, nor have they ever really been that good except for one year, kinda.