Scott Cawthorn, the sole developer behind the Five Nights at Freddy's series, apparently isn't done scaring the crap out of players with mechanical animals. On his official website an ominous teaser has appeared, which seems to suggest, that there were indeed other locations like Freddy's - "Sister Location - There was never just one".
We can't imagine it'll be too long before Cawthorn spills the beans, so stay tuned for more information.