One interesting concept could be how the characters adapt to the past's different social norms. For example, if they come from a more modern time, they might struggle with the lack of certain technologies or the strict moral codes of the past era.
Perhaps the alteration of historical events is an interesting aspect. In this fanfiction, the order traveling to the past might accidentally or intentionally change things that were supposed to happen, which could lead to a whole new chain of events and a different present or future.
One interesting concept could be exploring new planets that the Animorphs haven't visited in the original series. Another might be the development of different morphing abilities. For example, a fanfic could introduce a new type of morph that gives the characters unique powers or challenges.
Another possible main character could be a historian or a scholar within the order. Their knowledge of the past could be crucial in helping the order navigate the historical period they travel to, and they might also be on a personal quest to discover something that has been lost in time.
In this type of fanfiction, the concept of character evolution is fascinating. In an alternate universe, the characters may face different challenges that accelerate or change their growth. For instance, Yang might have to overcome a different kind of personal trauma. Also, the concept of the alternate universe's history and how it affects the RWBY characters is interesting. Maybe there was a different Great War in one universe, and that has shaped the current state of the world and the characters' place in it.
One interesting concept could be the merging of different magical worlds. For example, if it crosses over with another well - known fantasy series, it might bring in new magical creatures or spells. Another concept could be the interaction between characters from 'Order of the Phoenix' and characters from the other crossover universe. This can lead to unique relationships and storylines, like a friendship or rivalry that was not possible within the original 'Order of the Phoenix' story.
One interesting concept could be time - loop travel. In past travel fanfiction, characters might find themselves stuck in a repeating cycle of past events, and they have to figure out how to break it. For example, in a story set in a historical era, a character might keep reliving the same day of a significant battle, and through their repeated attempts, they learn more about the true nature of the battle and the people involved.
In this type of fanfiction, a cool plot could be Harry traveling back to the time when the founders of Hogwarts were alive. He could learn ancient magic directly from them. He might also get involved in the politics of that time, helping to shape Hogwarts' early rules and traditions. This would not only change his own future but also the future of the entire wizarding world as he brings back forgotten knowledge and wisdom from the past.
One interesting concept could be the exploration of different Servant backstories in more depth. For example, delving into the pre - summon experiences of a Servant that might not be fully covered in the game. Another could be alternative versions of the Holy Grail Wars, with different rules or participants. Also, the fanfiction might explore the relationships between the Masters and Servants in unique ways, like how they interact outside of battle situations.
One interesting concept could be the combination of different character abilities from Fate Grand Order and RWBY. For example, seeing how a Servant's Noble Phantasm might interact with a RWBY character's semblance. Another concept could be the crossovers in the storylines, like how the overarching plot of Fate Grand Order, which often involves saving the world from various threats, could mesh with RWBY's fight against the Grimm. Also, the character relationships that form between the two universes' characters can be really engaging, such as a Fate character forming an unexpected alliance with a RWBY team member.
One interesting concept could be how the characters' relationships might change if they are sent back in time. For example, Naruto might use his future knowledge to prevent certain tragedies from happening to his friends, like Sasuke's fall to the dark side. This could lead to a completely different dynamic between them.
One interesting concept could be the idea of Naruto having a past life as a powerful ninja from an ancient clan. Maybe he had different jutsu or abilities that he unknowingly carried over into his current life.