They were moved to the future to save them...
... from something, for some reason. At least that is my theory, maybe a drawn out, soap-filled TV remake of the movie Millennium (1989):
https://www.imdb.com/title/tt0097883/
Totally valid theory. Def similar to Millenium. Also reminds me of The 4400, where 4400 people who’d been missing from different years all appear at once. They, too, had special powers, each different than the next.
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