I believe there are two things that would probably force WSCR onto FM

1. If Audacy sold the tower site. WBBM is diplexed on the 670 site and already on FM, but for a different reason. This is likely at some point. They have it in line to possibly be sold. They could always just sell it to Vertical Bridge or another tower slumlord company like everybody else did and just lease it.

2. If WMVP ended up on FM