No way they shut Kidzone down until labor day at the earliest imo. By the time F&F opens, we're approaching summer crowds, so it just makes sense to keep it open for an extra few months.
Now the land could easily start to close off partially (in sections) before then, but like I said, I think Labor Day at the earliest and if it opens up again AFTER HHN, there's no way it doesn't stay open for the holiday season again, so then we're looking at January 2019 potentially.
I'm done believing any rumor on when this might close because we've been hearing it since 2014/15. Let me know when the walls are up.