I have a feeling that the next arc will be the last. Because, like, Jin has literally finished off almost all of his rivals, whether directly or indirectly. Part of Jin's past has finally been revealed. It was revealed that there is a "Union of Assassins", and apparently the numbered ones took the opportunity to shake them up too.
Well, Jin no longer has a "big villain" to face. The guy acted almost like Goku in Dragon Ball Super - too much power, too much power, too much power.
All that's left is to finish off Forest, and let's not doubt the cliché of kidnapping someone from the family and then everyone involved in the story going after the kidnapped person.