#2 Cross promotional pay per views
Imagine a Conor McGregor vs Brock Lesnar or a Kenny Omega vs AJ Styles. These are perhaps dream matches that fans would love to see someday. The WWE can surely make this happen even if it is a 'one night only' kind of setup.
With the NJPW, TNA, MMA, ROH and WWE all possessing a tremendous pool of talent, it would be a mouthwatering proposition to see a pay-per-view with some cross-promotional match cards. Superstars have often tread on the grounds of various promotions before zeroing in on where they ply their trade and hence, the familiarity value will also be high with the fans.
Secondly, throw in some title shots to the event and the outcomes of these fixtures will keep fans guessing on what is next on the cards. Titles could change brands, superstars could move promotions and the possibilities are endless.
Even though this can just be limited to one PPV a year, the buildup and the repercussions will be tremendous.