I really doubt this. A hoops league with UNC, DUKE, CUSE is not going to be enhanced all that much by ND hoops. If they're doing it because they hope ND football would one day join the ACC, they should look and see how that worked out for the Big East. ND's crown jewel that they offer is football, and they're not going to ever share that with anyone as long as there is a high profile conference for their other sports. Once that avenue disappears, then you may one day see them join a conference.
The B-12 isn't a home for the Notre Dame "other" sports. That is one problem with the scenario people lay out. There are a couple of significant holes. ND has a natioanlly ranked soccer team. The B-12 doesn't offer soccer. Natioanlly ranked lacrosse team. B-12, nope. Several other sports where ND excels are sponsored by the B-12 but at very modest levels. Both th eBig East and the ACC sponsor programs which are better suited to the Irish than the B-12. And while many schools wouldn't care that much, Notre Dame actually does care about having good homes for its other programs. Would it be a deal breaker? Probably not. But a consideration? Absolutley.
While we're at it, can somebody explain the love affair with Syracuse basketball? I keep reading how that is going to be the great addition to the ACC. But then I look at Syracuse's actual performance and I have to say huh? Compared with UCONN, Duke, UNC Syracuse is much more a second tier program. They won a national championship in 2003 but haven't been past the Sweet 16 since. Before that they hadn't been to an Elite 8 since 1996. So it isn't like they are a perrenial national championship contender. In fact, there 3 Final Four appearances were all more or less as dark horses. Indeed, without that great run in 2003 with a rented player, the Orange have been mostly Pittian (eg one who gags in the NCAA Tournement as the Pitt Panters regularly do) in the NCAA Tourney, regualrly losing to lower seeds. They have been a great rival for UCONN, but as far as post season performances, it isn't even close. Over the past 20 years this is what you see:
NCAA invites: S-16 C-16
National Champs S-1 C-3
Final Fours S-2 C-4
Other Elite 8 S-0 C-5
Other S-16 S-6 C-9