Nakamura, based on the WrestleMania program that is being sold in Dallas. Yes, it looks like they are ditching his first name but at least, they are not changing his name completely like they did with KENTA/Hideo Itami so this is not so bad. Nakamura requested to keep his name so it looks like he is getting his wish.
I am told that the company already has music and new ring gear for him.
He is still listed as Shinsuke Nakamura on WWE.com and in social media posts so it looks like they may gradually stop using his first name.