As much as I (and everyone in the country) think Notre Dame needs to be in the B1G, I'd love to see the conference strong-arm them into joining just to see, even if it backfires lol.
Their biggest rivals, USC and Michigan, are in the B1G. They also have long standing annual games already with Michigan State and Purdue. All of their rivals outside of Stanford and Navy will be B1G members.
Tell them if they don't join, they can kiss those teams goodbye off their schedule.
Are they gonna join the SEC instead? With the power those two teams have, they can go to 20+ teams each and take over CFB. Then they can construct a playoff and not let Notre Dame in.
Is Notre Dame ready to say goodbye to playing USC? A team they've been playing since 1926. Hell, they've played Purdue every year since 1946. Michigan and Michigan State have been playing Notre Dame since the freaking late 1800s.
The B1G and SEC could refuse to schedule them, then where do they go? Sure, the leftover teams would jump at playing them, but if the B1G and SEC form their super conferences and have their own playoff, everyone else is gonna be the AFL to their NFL. Actually, that's giving the cast-offs too much cred.