#2 The men have a lot of history together
One of the biggest reasons that this feud is best for business is that it makes complete sense. tt's good for WWE and even better for the fans, who love to see long-term stories followed up. Bray Wyatt, in his Firefly Fun House, often says " Friends forget, but The Fiend never forgets".
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What that implies is that any Superstar who has crossed paths with Wyatt, going all the way back to his debut 6 years ago, is not safe. The Fiend seems very likely to attack any former foe, as the monster seems to be triggered when he comes across anybody he has ever had a problem with. Daniel Bryan and Bray Wyatt spet the last few months of 2013 and into 2014 going toe-to-toe, and at one point in time, Bryan was actually a vey short-lived member of the Wyatt Family.
Much like most aspects of the Fiend character, this feud makes perfect sense. Everything is detailed and explained. It's not like The Fiend is attacking anybody and everybody just for the thrill of it or to cause chaos; there's a proper and meaninful reason behind every attack, and that will make the budding return of this rivalry special.