I dont have a sense at this point about the chances of Notre Dame coming our way.
But, a few points.
Re the Big 10 research consortium, Notre Dame is not as much a research driven school as most of the Big 10. It is not an AAU member.
While closer to Big 10 schools on average than to ACC schools, Notre Dame is in the eastern quarter of the country geographically and it is in the eastern time zone.
The ACC offers a footprint in the growing Southeast, as well as a strong presence in major metros along the East coast.
The ACC offers higher on average ranked undergraduate programs, as well as 5 other private universities, including one Catholic university, which is the only other Catholic school playing BCS Football at the moment.
The ACC traditionally offers the best basketball.