I wonder what's going on with TMNT Shell Shock, besides the obvious of being torn to pieces. I looked and it is still listed on NU's website, and not being listed as undergoing maintenance. Here's a few pics from Friday, along with a picture of the Shredder, the new ride being erected.
EDIT: Funny, 2 minutes after posting these pictures, I get an answer on NU's facebook site. It is undergoing refurbishment, and will be back in action soon.
Shredder construction
The sign reads "This ride is closed while we make changes for your enjoyment"