When the bankruptcy is executed, the BTC IOU's are assigned fiat value according to the day of bankruptcy. So the cheaper they can push them, using all the methods available, the less they owe. Legally, Gox can pay all that is owed, but the 2 years the court process takes, makes all the difference on who holds the goodies in the end.
You make some good points, but there is no way a court will use the Gox price when they set the market value of the BTC. For this plan to work they will need to somehow
crash the price at the other exchanges as well. If your theory is correct we will see someone dump huge amounts all over the place and then have Gox declare bankruptcy.
When I lift my eyes, this is all I see around me...