I believe that they'll be extending the street, and building it to
Pettygrove Green St [PDF] standards. The under construction climbing gym, the Overton and 1420 NW 14th also have a frontages to NW Pettygrove, so the green st should be a reality pretty soon.
The street face in front of the Freedom center already has already been built. Once the trees are mature, they'll do a nice job of masking that building.