It was officially announced by the Smoothie King Center in New Orleans that NXT TakeOver: New Orleans will be taking place on Saturday, April 7th during WrestleMania 34 weekend. Tickets will go on sale Friday, December 15th at noon.
Below is the announcement sent out by the Smoothie King Center:
 

JUST ANNOUNCED! For the first time ever, WWE NXT TakeOver is coming to the Smoothie King Center 4/7! Just one day before #WrestleMania34, NXT will TAKE OVER New Orleans! Tickets on sale Friday, December 15 at 12 PM. #NXT #WrestleManiaWeek pic.twitter.com/60mYvC9ek3
— Smoothie King Center (@SmoothieKingCtr) December 4, 2017