Since the West Tower sales center is now up, I imagine they're going to try to fill the building before beginning phase II.
Rendering by Crains
Also of note- "Renderings of the two future Wolf Point buildings that surfaced on the Internet over the summer depict a sleek tapering spire on the middle, tallest building, but Hines representatives say the renderings were not accurate or final. They won't comment on what Wolf Point will look like" :/ I love the south tower design.
Per Crains.