That’s a good question. If that were to happen, I think a Duke team that makes the final would be above UNC, considering A) that would give us two more Q1 wins and B) it would mean we’ve looked good with Zion in at least two games.
The other thing to keep in mind is that the committee has been notoriously inconsistent when it comes to how heavily it factors in head to head matchups. In 2017 we beat UNC 2 out of 3 and were the hottest team in the country after winning the ACC Tourney, but UNC was seeded ahead of us based on a better overall season resume. Last season Michigan was 2-0 against MSU and won the B1G tourney, but was seeded below MSU, again largely because of overall resume. If that pattern stays consistent, in the scenario described here history would be on our side... but the committee is fickle.