This episode marks the end of the canon storyline. After this, you can skip ahead to the next season since the next episode is a non-canon anime-original story. I would even highly recommend skipping it and go straight to Episode 0 of Hero instead. Honestly, this could have served as a pretty good final episode for the season. It has a nice mix of action, suspense, and a big reveal about what the antagonist(?) side is really trying to accomplish.