Spoke to contact at Ucity,
Penn Tower will not come down until the parking portion of the project at Civic Blvd and Health Center is complete. Once the Walls are complete they will be shipping in prefabbed concrete to complete garage portion in a very quick amount of time. The office/Medical part of the project will be completed at a later time. The building portion is being developed by Branywine Trust and will be leased back to Penn over a large portion of time. There have been some proposals of the building (some of which have been posted), but no dec. has been made.
When Penn Tower is leveled; they will be constructing a state of the art Hospital for Penn. This is where it gets dicey as the project is suppose to be built in phases. They would also eliminate a portion of convention Blvd. and add/redo an exit off of South that would pull right up to the ER portion of the hospital. All fine and good except it would make life much more difficult for CHOP entrance.
As more time goes on I would expect a larger and larger tower to be built at Penn Medicines future expansion site.