If all possible outcomes exist in their own separate universes from our own, imagine the possibilities. The South could have won the Civil War. Leonardo DaVinci could have left a note explaining the smile on the face of the Mona Lisa. The Matrix sequels might have been good.
One such possibility would be if George Lucas had managed to get the rights to the Flash Gordon character when he initially sought them. Denied the characters, Lucas retooled his story ideas and made Star Wars instead. The success of Star Wars prompted producer Dino De Laurentiis to finally create a movie centered around the character Lucas had been denied the use of. A flop in its own time, Flash Gordon is rightfully remembered as the cult hit it is today.