Board Thread:Theories and Rumors/@comment-36062903-20180919031659/@comment-34175192-20181001081051

Katherine1977 wrote: Everything is good and all but just one question. How will the sky pirates return if they don't have the realm crystal? XD The realm crystal was never destroyed. It's still locked up somewhere.

I seriously doubt the Sky Pirates will return, since they're not really "ninja allies" and most of the team don't know they exist. But if they were needed, it could be a possibility.