There's already a distinct relationship between the ACC and SEC, with four rivalry games taking place each season between the two conferences, and that relationship could move to another level in the future.
According to a report from ESPN.com, the ACC is considering going to a scheduling format that would see teams play eight conference games each season as well as one game against SEC foes. The report says that the "8+1 model" has only been discussed as a concept and is far from becoming reality, as the ACC is also still considering moving to a nine-game conference schedule.
It's an interesting idea, though it's hard to see it actually coming to fruition. While Florida-Florida State, Clemson-South Carolina, Georgia-Georgia Tech and now Louisville-Kentucky will certainly continue, I just have a hard time seeing the SEC agreeing to something like this.
Most of the speculation surrounding future SEC schedules has centered on the nine-game conference schedule. If that's going to happen I can't imaging SEC schools wanting to add an ACC game to the schedule as well. Plus, with the new SEC Network, the conference is going to want more inventory for the channel, which is one of the reasons there's such a strong push for the nine-game conference schedule in the first place.
If the SEC were to agree to this scheduling deal with the ACC the games added to the schedule wouldn't be added to the SEC Network's inventory.