A lot of people worldbuild when they daydream and have the bones of a story kicking around in their brain, but have to pay the bills and raise the kids etc so they never flesh it out and write it down. What’s your story’s premise? Fantasy, sci-fi, alternate history, mystery, western, whatever genre.
I have three things I want to see in a fictional world (either mine or someone else’s):
The current idea rattling in my head is for a game which will likely never get finished. A spaceship with a small crew gets blown off close while travelling at warp speed or whatever. The heroes need to visit a bunch of planets (and learn secrets within) to find… Elemental crystals or something, I guess, to make their way home. Not sure how I can incorporate magic into it though, or if that would just be scope creep.
I once started writing a story with a “monster universe” setting but in space. Werewolves and vampires always at war with each other. Humans and animal-humanoids caught in the middle. A few eldritch horrors lurking around the void.
I did a self contained short story set in that universe, about an observation station sitting at the edge of the galaxy, monitoring for potential intergalactic information. They detect a large mass of dark matter that only became detectable when it got close enough to reflect light from our galaxy. As they observed, they realized that the string of dark matter was just a tentacle the size of a large star cluster, and they couldn’t see what was on the other end. It swept close and then retracted away.