(warning: naughty language)
Hell is overpopulated. This is dealt with by periodically exterminating a portion of its citizens. But the princess of Hell, Charlie, wants to find a more humane solution to the overpopulation problem, and thus opens a hotel with the intent of rehabilitating sinners so they can be sent to Heaven.
Hazbin Hotel is an upcoming adult comedy/musical web animation series by Vivienne Medrano (author of Zoophobia). I gotta say, I really like what I've seen so far. The characters are interesting and funny, the music (by Gooseworx) is great, and the artstyle is cool. It's so refreshing to see an adult cartoon with an inspired and unique design, rather than that vapid Family Guy artstyle that keeps popping up.
Coming in 2019...