Indiana is a cinch to be in, and the teams that will host, as of now, are Big 10 Champ loser, ND, PennSt, and UGA...really hard to see any other scenario right now.
The key is where we will be relative to Indiana because that puts us at 9 or 10 depending on that. At 9, you just need one upset (ND at USC being the most likely) to host. At 10 you really need some help, but in that case, if Indiana is 9, at least with an upset you be playing in Bloomington which would likely be the easiest road test.