#4 Making good use of stables
One of New Japan Pro Wrestling's greatest strengths is the use of a number of different stables who battle it out for superiority on a regular basis from event to event. There some truly world class factions here including the likes of Bullet Club, CHAOS, Los Ingobernables de Japon, Suzuki-Gun and more.
This not only helps create a sense of identity and belonging for wrestlers, but it also brings back one of the greatest aspects of The Attitude Era when factions ruled the roost. There is also the added benefit of cashing in on merchandise sales.
Just look at how popular Bullet Club merchandise is on the indy scene and you will get a great idea as to how much money can be made by creating top notch stables the way NJPW has. The recent popularity of The Shield, The New Day, and even SAnitY in NXT shows that stables are still a viable option for the WWE.