4. The White Hummer Attack
In 1999, WCW set up their own "whodunnit" angle, six nights before that year's Great American Bash. In said angle, World champion Kevin Nash was seated in the back of a limousine when, suddenly, a white Humvee smashed into it, severely injuring "Big Sexy" at the very least.
Nash not only wrestled at that Sunday's event, but the angle was never truly concluded, outside of a tongue-in-cheek callback involving Eric Bischoff close to a year later. The attempted murder mystery never got a proper payoff when the angle was fresh.