I'm not entirely sure specifically what 'confederacy worm fanfic' is about as it could be a very niche or fan - created concept. It might be a fan - made story related to something called the 'confederacy worm', perhaps in a science - fiction or fantasy setting.
As far as I know, no. Given that 'confederacy worm' is not a common or mainstream concept, it's not likely that there are popular fanfic works specifically about it. There could be some small - scale, niche fan - created works, but they probably haven't gained widespread popularity.
Well, if the Confederacy was good, it could change the whole dynamic of the Star Wars universe. Maybe they were fighting for a just cause that was wrongly perceived. Or perhaps there was a misunderstanding that led to conflict.
General Grievous is often a popular character. His menacing appearance and his role as a powerful military leader in the Confederacy make him an interesting focus.
Collagen worm fanfic is rather an unusual term. It could potentially be a fan - written story about a fictional entity named 'collagen worm'. In fanfic, people often take an existing idea or character and expand on it in creative ways. So perhaps in this 'collagen worm fanfic', the author is exploring the nature of the collagen worm, its habitat, its interactions with other beings, and creating a whole new world or story around it. However, since we don't have more information, it's difficult to be more precise.
A 'catnip worm fanfic' could be a piece of fan - created fiction that involves catnip and worms in some way. Maybe it's a story where a worm has an encounter with catnip, or perhaps there are characters in a fictional world who are affected by catnip and there are worms involved in the plot. It really depends on the creativity of the fanfic writer.
Complementary worm fanfic could refer to fan - created fictional works related to something called 'worm'. It might be stories that complement the existing 'worm' - related universe, perhaps by exploring different aspects of the characters, events or concepts within it. For example, it could expand on the backstories of certain characters that were not fully explored in the original 'worm' work.
A banshee worm fanfic is a piece of fan - created fiction related to the concept of a 'banshee worm'. It could involve stories that explore the nature, origin, or adventures of this fictional banshee worm. Maybe it's set in a fantasy world where the banshee worm has special powers or is part of a complex ecosystem.
A simple way could be through a dimensional rift. A character from RWBY accidentally stumbles into the Worm universe or vice versa. Then they have to figure out how to get back while dealing with each other's worlds' problems.