A bit of research shows that this thing still hasn't really gotten off the ground. They've done some clearing, but it seems that's mostly it. I don't see it happening if I'm honest.
This is what the site looked like earlier this month. The photo is from an article by 'The Next Miami'.
Like Vaugc002 has mentioned, this was announced a very long time ago, so I'm not entirely sure why ATI has made a thread for it now. It just hasn't happened. Reminds me of the Chicago Spire and the Polercoasters.