30 Movie Franchises That Started But Never Finished
Like so many of the movies on this list, The Mortal Instruments was another series that attempted to take advantage of the YA boom in the early 2000s. Unfortunately, it didn’t have the massive success of the best performing franchises of that era, possibly because it was more of a fantasy series than many of the other YA films of its era.
Although the series has plenty of die-hard fans to this day, that audience wasn’t large enough to justify putting more money toward a sequel. Instead, they turned the series into the moderately successful Shadowhunters TV show that aired its series finale in mid-2019.