I mean in that’s scenario (imo) it’s a huge points deductions down to the championship rather than an expulsion purely as it’s easier to logistically handle.
A full guilty verdict would ‘confirm’ one of the UKs biggest ever frauds and would see the SFO coming in and the executive suite getting their collars felt + Uniteds new CEO and executives at UAE state owned Etihad & Etisalat being questioned by U.K. police, and an international diplomatic incident.
City would be sued by every other PL club and half the FL and be insolvent in no time.
So as said before - utter chaos. But none of that is happening without the PL presenting something so incontrovertible that it’s not going to be defended.