We were on the Inspiration in June and she already has a basketball court. I imagine it will stay put, as I don't see anything on the refurb details that deal with that area.
Unfortunately, I don't have any photos of it to share with you. IIRC, it's one deck below (and right behind) the funnel on the aft end. I seem to recall it's a half court. There always seemed to be a game going on whenever we walked by.
Enjoy your trip!
Disney Magic - 7-day Eastern Caribbean
Carnival Inspiration June 2007 - Grand Cayman & Cozumel
Dawn Princess August 2007 - North to Alaska