Welcome to SEC, but be prepared for quite a bit of apathy. Sure, you'll get some folks who are giddy over the addition, but you'll get many who aren't and really couldn't care less (me). Maybe the TV market thought will pan out later, but right now, yeah it's a huge market....but it's generally apathetic towards college football. The numbers prove that out. Rivalries? I guess they'll develop. But right now no one is getting excited about starting a new rivalry with mizzou. Maybe vandy and kentucky are licking their chops at mizzou joining the East so they'll have competition at the bottom, but that's about it. Not saying you'll be at the bottom, but a few programs hope you'll make them look better, because honestly, it's their only hope.
Really, you're coming to the SEC because the winds of change are blowing, the Powers That Be decided against clemson, wvu, fsu. It's not the best idea to bring another powerhouse like oklahoma to the fold, and there are mixed messages as to their desire to even come over.
Soooo.....you've got a tv market that will hopefully swing towards more excitement for big boy football. You've got academics (goes without saying, really...not like we're gonna consider a JuCo for the 14th member), you've got basketball (fair point), probably have decent Olympic sports (), and a top 40 football program.
As long as you run your football program better than ol' sis, kentucky and vandy you should do fine.