So many different things could have made the 2015 in BTTF2 disappear.
Now that Marty doesn’t get in that car accident that damaged his hand, he continues his pursuit of being a musician. One of his roadies would have been the genius that eventually creates hover technology (cars and boards), but now he’s too distracted with his roadie responsibilities.
Maybe the inventor of “Mr. Fusion” got the idea when brain storming with his wife. He met her while they were both taking pictures at Clayton Ravine. He was there for environmental studies, while she was just visiting the place where one of her ancestors died. But thanks to Doc Brown, he was still there and she was not.
I love talking about time travel.
-Jimmy Purcell.