Sure they could. The ACC could welcome us as an equal, not subservient to Michigan and Ohio St.
Fuhgeddaboudit,
The ACC is a patchwork of teams trying to make it in a football world.
FSU join the ACC for the sole reason of dominating in a weak conference.
The Big Ten has a strong history in football and a relationship to Notre Dame as an independent
The Big 10 is head-and-shoulders stronger than the ACC in football competitive in basketball and though I do believe the ACC is better baseball I can live with Notre Dame playing in the Big 10
Why would you want Notre Dame to feel welcome in a week conference?