While visiting in 2011 a CM told me about bathrooms that would be put in close to where the old skyway ended. This looks to be it.
New Rapunzel-themed restrooms open at Disney World’s Magic Kingdom (A Mom and The Magic)
The outlets to juice the phones up will be a huge bonus.
She also mentioned another entrance to HM that would be added around this which would tie into the new fantasy land too. Time will tell on that.