I'm not entirely sure specifically as there could be various interpretations. It might be a fan - created fictional story that involves a conflict or interaction between characters named Hunter Bell and Bete. It could be set in a particular fictional universe that the fans are familiar with.
Definitely. The idea of Vampire Hunter D taking on Dracula is a very appealing one for fanfiction creators. There are so many directions to take it. For example, they could write about how D would deal with Dracula's minions first. Or they could focus on the psychological battle between the two. Since D is a dhampir, half - vampire half - human, his internal struggle when facing Dracula, who represents pure vampiric power, could be a great point of interest in fanfictions.
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.
The Hunter x Hunter manga has indeed concluded. However, the ending might have left some fans wanting more or with mixed feelings depending on their expectations.