ND is likely coming. All the insider talk is that the admin wants it and are waiting on the priests, who appear to be leaning that way too.
ND can get out of the ACC deal pretty easy, the contract says they can't join another conference. They could just walk from scheduling any ACC teams and schedule BIG10 teams with additional compensation from the Big 10. Not ideal but one way to get out of the ACC conference until it folds or they agree to a reduced buyout.
I'm hearing 2 weeks until an announcement. Decent contacts, but nothing is certain yet.