Hi Scott,
Was there a direct storyline reason for the Hart Foundation's original face turn? I remember it essentially happening as Bret sending Jimmy to the back before a singles match on Superstars, and I guess that Bret had been a bit face-y since the battle royal, but I can't recall if there was a specific incident or tease of the split prior to that.
Well the main impetus was the battle royal that opened WM4, where Bad News turned on him, but the main turn came because Jimmy Hart started two-timing them by managing the Rougeau Brothers as well and then turned around and sold the Harts' contracts to the Rougeaus. The turn was gradual leading up to that, with Bret doing singles matches and wrestling more as a babyface, specifically against Bad News.