With the Big XII about to expand, Connecticut is the only realistic remaining addition for the ACC. I say the ACC adds them and Notre Dame ends the madness. Doesn't hurt Connecticut's chances that ESPN headquarters are located in their state.
North: Notre Dame, Louisville, Pittsburgh, Syracuse, Boston College, Connecticut, Virginia, Virginia Tech
South: North Carolina, North Carolina State, Wake Forest, Duke, Clemson, Georgia Tech, Florida State, Miami
Connecticut is the only option for the ACC if the XII expands eastward which is probably everyone's best guess with Cincinnati. If the XII happens to balk east and go west then the ACC could always snag Cincinnati if they wanted. I don't see Notre Dame going full in until at least the end of the ACCN deal ends in 2035-36. By then, the ACC could look to bring on Cincinnati and Connecticut.