The hunters found a time-turner and decided to go back in time and change things so that the girls never fell in love with the boys. They soon realized this was a big mistake because.....
1. If Annabeth never liked Percy, she would've never gone to the Grand Canyon to find the person with one shoe because she wasn't daring Percy so she probably wouldn't care that much.
2. Piper would've never volunteered for the quest, assuming that the trio ever even got to Camp.
3. Percy would've stayed at Camp Jupiter and wouldn't have any memories of anything, not even Annabeth
4. Calypso would still be on Ogygia and might not have ever even met Leo
There might be more but this is what I've come up with. Anyways, if you have any ideas for what would've happened, please comment them!
