WWE has yet to confirm the next NXT TakeOver special, but it will indeed take place during WrestleMania 37 Week.
When going to cancel your WWE Network subscription, WWE will attempt to convince you to not cancel and has three events listed including TakeOver on April 8th, which is the Thursday before WrestleMania.
Pwinsider.com reports that there has been talk backstage about this show being a two-night event with the idea that the first night would air on NXT TV on the USA Network on Wednesday, April 7. Then, the second night would air on Thursday night on the WWE Network.
The report stated those plans could “change or evolve” since there’s just over a month to go before the event.