Since there's no official ending yet, it's hard to say. But if it follows the pattern of the series so far, it could be very satisfying. The series has been great at character development, so seeing all the characters reach a proper conclusion would be great.
I'm not entirely sure as the 'Hunter x Hunter' manga and anime are still ongoing with no official full ending as of now. But generally, it might be about the conclusion of Gon's journey, his growth as a Hunter, and how he resolves the various relationships and challenges he has faced throughout the series.
The Hunter x Hunter manga is unfortunately not complete. The author has faced various issues that have led to intermittent breaks and an unresolved storyline.