UPDATE: WWE has confirmed it. You can see their story on WWE.com here, and they posted this Instagram from Shirai:
ORIGINAL: It almost happened in 2017. It’s been an open secret that it would in 2018. Now, after an appearance during WWE’s second day at Tokyo’s Ryogoku Kokugikan, it’s official.
Japanese wrestler Io Shirai, regarded by many as one of the best in the world regardless of gender, is a WWE Superstar:
@shirai_io bow down to the queen. pic.twitter.com/Cdt7wYQyO0
— Anoa'i (@Vitalinho_) June 30, 2018
新たな一歩。 pic.twitter.com/AKJTHF1fqo
— 紫雷イオ、Io Shirai (@shirai_io) June 30, 2018
She’s headed to NXT, and probably the second Mae Young Classic when it tapes in August. We should hear more on that soon.
In the meantime, GET EXCITED!