Big Ten, Pac-12 will “grow schedules together”

The Big Ten and Pac-12 have announced that they’ll “collaborate” on long-term, interconference scheduling:

Likely beginning as early as next year, the Pac-12 and Big Ten are going to significantly reconfigure their future football, basketball and Olympic sports schedules to feature games between their combined 24 member schools.

Wonder what watered the soil for this?