Spot on...before you ever play a down in the ACC our future will most likely be decided. It would be better for SU if RU lands in the ACC over the Big 10.
Unless Notre Dame makes a move, Rutgers is going nowhere. Even if Notre Dame makes a move, Rutgers is unlikely to be going somewhere.
Let's say you are correct (unlikely) and sometime soon ND ends 60 years of courting by the Big Ten and ACC and decides to join one of them.
If ND joins the ACC, UConn is far more likely to be school 16 than RU is. They clearly want a stronger basketball league and there is no comparison on this.
If ND joins the Big Ten, Missouri will be taken before Rutgers. I believe the only reason Missouri has not taken the SEC offer yet is because they are willing to wait at least one more year for ND to make up their mind, so their dream of playing in the Big Ten might be realized.
Your best hope is for the ACC to get raided by the SEC so it becomes desperate for schools, or for Missouri to join the SEC, and later, ND to join the Big Ten.
If say the ACC lost FSU and V Tech, I am not sure they would add schools like UConn and RU...they would still have 12. But it is possible.
If the Missouri to the SEC, ND to the Big 10 scenario happens, maybe the Big Ten would take a 16th school (it ran for a long time with an odd number of schools before and might well do it again given the lack of attractive options available). But if they decide it is imperative that they get to 16, maybe they would select RU (though UConn, Kansas and other schools like Maryland, Pitt and Syracuse might be more attractive and be willing to leave better situations than RU had).
What do you see happening to rescue Rutgers?