Saya Kamitani stated that if she wins the IWGP title, she wants to be signed to both NJPW and STARDOM.

https://www.tokyo-sports.co.jp/articles/-/372448

“I get excited about doing things no one else has done. When I win the IWGP and STRONG titles—belts under New Japan’s jurisdiction—I want to be a dual roster member of both STARDOM and New Japan Pro-Wrestling. I want to broaden my scope in the ring and make things insanely fun and entertaining.”