Not necessarily. It could be a sign of a new beginning. Maybe when all things novel end, it makes room for a new cycle of novelty. However, if we think in terms of creativity, it could be negative as it implies the end of new ideas.
It could mean the conclusion or the final state of all new and innovative things. Maybe it refers to the point where all novelty has been exhausted in a particular context, like in a creative field or in technological advancements.
Well, it could potentially be about the final events or conclusion in a Harry Potter fan - made story. Maybe it focuses on how the characters' arcs end, like Harry, Hermione and Ron. It might also explore the end of the magical world as imagined by the fanfic author, with things like the fate of Hogwarts and the wizarding society.
It could be about Naruto facing the ultimate threat that endangers the entire ninja world. Maybe all the previous enemies team up in this fanfic, and Naruto has to use all his strength and the bonds he's formed over the years to defeat them.
It might be a new, extremely powerful villain that combines the powers of all the previous villains Naruto has faced. This character could be seeking to destroy the ninja world for some grand, twisted reason.
I'm not entirely sure as I haven't read it specifically. But generally, a 'j2 fanfic' might be about two characters (presumably named J and 2). It could be about how all good things in their relationship or story come to an end and then begin anew in some way, perhaps with new challenges and growth.
One main theme could be sacrifice. Just as in the original series, characters might make sacrifices at the end of all things to save their world. Another could be redemption, where characters who have made mistakes find a way to make up for them in the end.
You could try searching on popular fanfic websites such as Archive of Our Own (AO3). It has a vast collection of fanfictions, and there's a good chance you might find this 'j2' fanfic there.