Checking out the construction cam for Skyhouse recently, I noticed that they are going with short span construction (columns in the middle where the end of the parking stall would be and no real beams), which you typically don't do unless there is a good reason because you disturb the parking layout that way.
This *could* mean that they are leaving the option open for adding a tower above the garage at some point because commercial/residential buildings don't work well with a long span structural system. It also could mean they just want to limit the floor-to-floor heights by eliminating beams. Just speculation at this point, but those rumors could have some merit.