It’s all but guaranteed that the third entry in a film franchise won’t live up to the heights of the first two. Maybe the original writers and directors moved on, or the previous films didn’t leave enough narrative potential to sustain a third film, but it’s rare for a franchise to remain strong through three entries. How to Train Your Dragon: The Hidden World, while a fun conclusion, upholds this rule and does not chart a course for anything but more of what we’ve seen.
Or, rather, you’ve maybe seen. I remember loving the first How to Train Your Dragon...