The WDWMagic website is reporting that Disney filed a permit with Orange County last week to remove the outdoor staircases from the parking lot side of Mannequins. These stairs connect the 2nd and 3rd floors with the ground and were connected to upper floor emergency exits. Back in the day when PI was packed every night, the stairs were often used as the entrance to the club because there was extra space outside for queuing. In fact, during the final Thursday night of Mannequins existence, entrance was directly to the 2nd floor using these outside stairs. There is no indication the entire club is coming down however the removal of upstairs emergency exits effectively means the upper floors can no longer be used were anything to reopen inside.
Monday Update: Disney has also pulled a permit pertaining to the "light bridge" that connects the former PI Live booth over to the PI Live bar. You'll recall the prior rumor about the booth being taken down so that Sosa Cigars can have an upstairs smokers patio. Perhaps this is the first step towards those renovations. In this photo (left), we believe that green tower that runs over the main entrance near the Hub is what is being referred to.