By Justin Barrasso Long before AEW and NJPW announced a joint pay-per-view, WWE was engaged in discussions with the Japanese promotion. SI.com’s Week in Wrestling is published every week and provides beneath-the-surface coverage of the business of pro wrestling. Had WWE had its way, the “Forbidden Door” would have not opened in AEWAll Elite Wrestling and New Japan Pro-Wrestling announced last week that they are coproducing a supercard this June, opening a world of possibilities with the Forbidden Door pay-per-view. The show will be the result of an ongoing collaboration between AEW president a…