I believe ND said yesterday that they are protecting 3 annual games: Navy, USC and Stanford. They didn't say that about Michigan, Michigan State or Purdue. So they seem to have already started prepping their fanbase for discontinuing certain rivalries should they need to in joining the ACC full-time for football.
Also interesting to see how the ND fan reaction towards preserving independence is much more mixed than ever before. The old guard still demands it, but seems like the under 50 crowd is fine with doing either.
I'm still not sold that they'll move football to the ACC fully anytime soon. But I think it's more likely than I thought a couple days ago.