The Big Ten's not going to go for the AAC, MAC, MWC, Sun Belt, CUSA, or Big 12 and no SEC team outside of maybe Missouri would trade the SEC for the Big Ten. The ACC's grant of rights doesn't expire until 2036, so there were going to be no moves until maybe 2033 or 2032 at the earliest.
The only real moves the Big Ten had left to make in the immediate future were:
1. Poach more Pac schools, which would have been at most some portion of Cal-Berkeley, Oregon, Washington, and Arizona
2. Get Notre Dame, which won't happen because it has an existing contract with the ACC that it can't join any conference outside the ACC until 2036 (plus it's GOR for everything outside of football lives with the ACC)