Just to add a few things to this.
When Sankey was asked about expansion he said, "it's not on the front burner" and went on to talk about things the SEC had their focus on right now. One guy pushed the question and Sankey complimented bringing Mizzou and A&M in the conference. He went on to mention a few things including their athletic tradition, their membership in the American Association of Universities, and both were in "contiguous states."
In my interpretation that means he is thinking about the future and expansion. It has to be a school that is a member of the AAU, with athletic tradition, and in a bordering state to a current SEC school. That leaves A LOT of possibilities open. What are there, 11 bordering states to SEC country?