Bella Goth is still missing according to theory
https://www.youtube.com/watch?v=3fTd-OTk0pQ He says that The Sims 4 is an alternate timeline and, therefore, Bella Goth is still gone. The Sims technically ended with The Sims 2. etc.
Forum Discussion
When I was playing Sims 3, Midnight Hollow, Bella was there. I read her bio and it said she had recently escaped from a mad scientist who had kept her locked up in his basement. I checked out the local mad scientist's house and he had a few jail cells in his basement. I believe her bio said something about why she didn't go home but I'm not too sure, it's been a couple of years.
