Wouldn't the perfect reveal for the Uncle Howdy angle be that it is Grayson Waller, pulling the ultimate troll on Bray Wyatt and LA Knight?
Besides Grayson's well established hate boner for LA Knight, Graysons' the sort of egotist who would be jealous of all of the attention Bray's return has gotten him. Along with the notion that with Hunter's ascension to the throne, that Grayson's jealous he's still stuck on NXT while Knight is now part of the main roster.
So he decides to start gaslighting Wyatt with the Uncle Howdy persona while at the same time, manipulating things so that Wyatt/Knight become rivals. Worst case scenario, Wyatt snaps, goes back to being the Fiend and destroys LA Knight for Grayson, leaving Hunter to deal with a returned Fiend terrorizing the roster and giving him headaches and trouble.
Best case scenario, he destroys Wyatt's sanity and gets Knight to finish him off, at which point Grayson will unmask and reveal that he manipulated Knight into destroying an innocent man and then destroy Knight. At which point, Grayson will ascend to the main roster whether Hunter likes it or not and have the street cred of being the man who destroyed Bray Wyatt as he becomes one of the A-List villains in the WWE.
Sure let’s go with it.