The Frozen movie series is set to see its winter last even longer than expected, with Frozen III just one upcoming project that fans can look forward to. Despite the fact that the third movie hasn't come out yet, it's been revealed that work on Frozen IV has already begun. This is only one of multiple Disney and Pixar sequels coming down the pipeline, and the frequency with which they're releasing is somewhat troubling.
Source：https://www.cbr.com/frozen-4-risky-disney-sequels/
