What if John wrote first?
In Star Wars: A New Hope, the character Han Solo was confronted by an intimidating bounty hunter, Greedo. In the original cut of the film, Han shot Greedo before things could get out of hand. This fit with the anti-hero arc, Han was the scoundrel with a heart of gold. In later recuts of the film, Greedo shot first. And so in nerd circles, people lament, 'Han Shot First.'