The 'ant king story' could be about various things. Maybe it's a story about an ant king leading his ant colony, facing challenges like finding food, protecting the nest from enemies, and managing the different tasks within the colony.
I'm not sure exactly as I haven't read this specific 'the ant king story'. But generally, it might be about the adventures of an ant king, perhaps his leadership in the ant colony, dealing with threats from other insects or environmental challenges.
The Ant King chapter of the full-time hunters was one of them. This chapter told the story of the ant kingdom and the conflict between the ant kingdom and humans. In this anime, we saw many classic battle scenes and unique character settings, some of which left a deep impression on us.
Obviously, the ant king is one of the main characters. There might also be other important ants in the colony, like the queen if she exists in the story, and some key worker ants or soldier ants that play important roles in the events of the story.
I'm not certain about the specific 'the ant king story', but the ant king is bound to be a main character. There could be some heroic ants in the colony who help the ant king in his quests or challenges. Maybe there are some outsider characters, like a friendly beetle or a wise old spider that interact with the ant king and influence the story in some way.
I don't think so. There haven't been any official announcements or indications that the HxH manga will continue. But you never know, maybe there'll be a surprise in the future.