NOLA may never be rebuilt per se. It may just be jigged up to allow the port to get materials through. If I got 100K of insurance money for my house or biz in NO I'd never even consider investing it back in there. Wdyoo? America is too darn big. If your country only has a few hundred miles of coastline almost anything can be done. From Brownsville to Virginia Beach is a long way.
In all honesty, we'll probably see Baton Rouge grow in population quite a bit for that reason.