Would be if they wanted to join a football conference. Their deal with the ACC doesn't require them to join the ACC for football, but does state that ND can't join any football conference other than the ACC during that period. Strictly a hunch, but my guess is that in the minds of the ACC, that provision is worth quite a bit more money than is ND's GoR provision (IIRC, ND's GoR, which does not include football, is worth roughly the same as Wake Forest's, which includes football).