So 12 or more years down the road, until then ND is staying in the ACC. That is a long time to wait for the B10 next move, but I guess they do not have to be in a hurry.
Everything now depends on the money the P12 schools are going to get and what the B12 can offer those schools. If the numbers are close, the 4 corner schools will stay, if not, they will leave. Oregon, Washington and Stanford will try to jump to the B10 if the invite is there down the road, otherwise they will stick it out in the P12, unless the 4 corner schools jump, forcing them to move somewhere.