I can assure you that FSU based on information is much more likely to end up in the Big 10 than the SEC. Even if ESPN came back to the ACC and said lets renegotiate, I dont believe FSU would stay. They are done with the conference unless they get an absolute sweetheart deal.
The Rumors are that the SEC is much more interested in UVA and UNC than they are in FSU/Clemson while the Big 10 appears to really want FSU first and then will figure out their travel partner. Do not sleep on the possibility of Georgia Tech as FSUs partner to the Big 10.
The ACC added SMU/Cal/Stanford to keep the conference together and to keep their current media contract.
I suspect you will see FSU/Another ACC team to the Big 10(most likely either UNC/VA/or Georgia Tech
The SEC will try to add UNC/UVA
If the big 10 and SEC take 2 , which I think is likely, don't be surprised if the Big 12 tries to come in and snipe 4 more from the ACC to get themselves also to 20 teams.