After a three-way main event at the last STARDOM show Io Shirai hit the ring and attacked Oedo Tai and asked Viper to join her in the Queen’s Quest group. Viper agreed. Shirai announced that she would return to the ring on August 13th at Korakuen Hall, and that she would also be in the upcoming Five Star Grand Prix tournament. She also issued a challenge to Team Jungle for the Artist of Stardom championship.
According to Dave Meltzer in the latest issue of the wrestling observer WWE has changed their mind on bringing her in to the company and thats why she returned to STARDOM.
Meltzer reports that WWE decided against offering her a contract due to her neck issues that they found in her physicals, but they had stalled on offering her a contract months ago when they found out about the injury while she did her medicals in the U.S. After she did her medicals, WWE wanted her to take time off to rehab her neck. She did that and was just cleared by doctors to return to the ring after her therapy. Then WWE seemingly decided against offering her the deal.