I hope B12 dangled the 14 and one spot left thing to get P12 schools to move. I also hope it is Arizona and Arizona State they are trying to pry loose vs. just Arizona alone. I believe Yormark and the B12 got UConn and Colorado approved back in May 2023.
I also believe the rumor that #13 and #14 got already approved pro rata by ESPN and Fox, but #15 and #16 got approved by ESPN ($20M) but not yet by FOX ($11.7M). B12 is working with FOX to get the final approval for #15 and #16 pro rata.
The story that got floated over the weekend about B1G taking Oregon, Washington, Clemson, and FSU is just another rumor to destabilise the PAC-12. The story was probably floated by someone within the B12 to get Arizona and Arizona State to move. I wouldn't be surprised if was floated by Yormark's team. I don't believe Clemson makes sense for the B1G but FSU does.
Ultimately, the B12 wants to end up with Arizona, Arizona State, and UConn. It will be 3 in the West with 1 in the East.