Relax. PB was talking hypothetically.
Afaik, nobody is questioning the value of the sponsorships. And the club proved to CAS that ADUG didn't pay any money to Etihad.
(You can stop reading here if you like)
But, if you have a moment, just consider what the PL is suggesting. They are saying Etihad entered into a sponsorship agreement at fair value but could only pay 8 milion of it and had to get funds from ADUG for the other 60 million. This is the Etihad that is funded by the government of Abu Dhabi, not known to be short of cash, and that funded losses at that time of a billion a year. They would make that arrangement for 60 million? It doesn't make any sense to me, no matter what evidence they think they have.
Add to that my opinion, that, assuming we accept the sponsorship was at fair value, the accounts give a true and fair view just as they are, then even that doesn't really matter. For reference, the club's accounts don't have to be either accurate (no accounts are accurate, they all have things wrong with them), or give a true and fair view of the club's financial position for PL purposes. They have to give a true and fair view to any "normal" reader of the accounts, say someone potentially trying to invest in the club. To that reader of the accounts, showing a fair value sponsorship as equity would actually distort the view given by the accounts, because they wouldn't show the true potential for income generation. Even if Mansour, in my opinion, delivered bags of cash over to Etihad himself on the backseat of his Maserati. Because it is the fair value of the contract and the fact the contract was fulfilled by both parties that determines the true and fair accounting treatment, not how it was funded. The PL may want a different treatment for their purposes, but the accounts, imho, are fine just as they are.