I'm pretty sure all that really means is that the new regime will have to sanction the deal now, rather than it just being a case of the old board selling the player to us.
I very much doubt it will be case of them ignoring the deal that is already in place, and acting as if this is an entirely fresh set of negotiations which we have to start from scratch - a spot of journalistic licence there to wring a bit of sensationalism out of the story.
Also, as a side - I thought Cook and Rossell were old colleagues from their Nike days - in which case I very much doubt the new president would want to piss the City board off in such a public fashion as one of his first moves in the post!