It could be the unique take on the character Peter. Maybe it presents him in a way that's different from the original source, like exploring a secret side of his personality that hasn't been shown before.
The 'spectacular' part might suggest that it has some really exciting or extraordinary elements in it. It could be unique in terms of its plot. For example, it might involve a secret mission or a hidden power that Peter has. And the fact that it's a secret fanfiction implies that it might have some elements that are not commonly known or expected in regular fanfictions about Peter. This could include a unique relationship or a new backstory for the character.
The uniqueness of 'peter spectacular secret fanfiction' might lie in its combination of elements. It could blend different genres in a way that makes it stand out. For instance, if it's a science - fiction - based fanfiction about Peter, it might combine elements of mystery by having this secret aspect. It might also have a unique writing style. The author could use a very descriptive and immersive language to bring the story to life. Moreover, the secret aspect could be related to a hidden world or a group that Peter is involved with, which is different from the typical settings in other fanfictions about him.