Okada defecting to NOAH would be a bigger tilt in the wrestling landscape than him going to AEW or WWE, do you agree?
It would be huge, but him leaving Japan as a whole and going to WWE or AEW would have a bigger impact since he left his country and everything. It would be like when Shinsuke left New Japan at the top of his game and went to WWE or when AJ left TNA and went to New Japan for example.
Okada going to All Japan would be interesting and big as well since would three hot acts there in Nakajima, Okada, and Kento. As well, you could have Okada and Nakajima become a tag team and really lean into Nakajima's gimmick of Strong Style over Royal Road/King's Road, with two people who embody the idea of Strong Style, though Nakajima embodies it a bit more but regardless.
Then later if the angle gets hot and over, you could then set up an invasion style angle between AJPW and NJPW and even NOAH and a few others thanks to the United Japan Pro Wrestling thing they formed. And you can really get into the battle of styles and dream matches and old guard fighting for their promotion and so forth.