espn has no clue what is going on (so far Chip Brown has the best information that I've seen); and I just can't stand espn.
Maybe Arkansas, but I don't see LSU as a natural rival; they certainly wouldn't be the kind of rival that Texas currently is, since they have stronger traditions with other SEC schools and more hate.
Even with the reports that they are trying to save the Big12, I just don't see it happening.