From my sources at DTD, I don't think PI is going to close but there may be some re-structuring. A few of the venues are just too big of money makers to be likely to close (AC, Mannequins, 8-TRAXX), and the BET facility shares a kitchen with AC and is often rented out as meeting space.
That being said, RNR BC is not likely to be the last club to undergo a change, and we might see some clubs run by outside companies make an appearance. I have no doubts there will probably be a lot of Disney staff cuts like Mike mentioned, but that doesnt necessarily mean PI will be going away completely.