Well, in RWBY parallel fanfiction, a common concept is the exploration of different Semblance abilities. In the original RWBY, each character has a unique Semblance, but in parallel fanfictions, authors might play around with how these abilities could be different. Also, the setting of the story could be altered. Instead of the usual academies, the story could be set in a more dystopian or utopian version of Remnant.
Well, in some Naruto parallel universe fanfiction, there could be a world where the Akatsuki are the good guys. They might be trying to save the ninja world from a greater, hidden evil that the regular villages are unaware of. Also, a really cool concept is a parallel universe where the tailed beasts are free and live among humans as equals, and they help in training the young ninja, which would completely change the power dynamics and relationships in the story.
One interesting concept could be the different versions of the gods. Maybe in the parallel universe, the gods have different personalities or powers. For example, Zeus could be more benevolent or Poseidon could have control over a different element. Another concept might be how the demigods' relationships change. Their friendships or rivalries could be completely different, like Percy and Annabeth being enemies instead of friends.
One interesting concept could be the use of hypnosis to unlock hidden powers within the RWBY characters. For example, a fanfiction might explore how Ruby could access a new level of her speed semblance through hypnosis -induced mental training. Another concept could be hypnosis as a form of mind control used by villains, creating intense conflicts as the heroes struggle to break free. Also, it could be used in a more positive way, like hypnosis for healing psychological traumas that the characters have endured during their battles.
Well, one interesting concept could be the combination of the Guyver's powerful bio - armor with the unique abilities and settings in RWBY. For example, how would the Guyver's weapons and enhanced physical capabilities interact with the Huntsmen and Huntresses in RWBY? Maybe the Guyver could bring a new level of power and strategy to the battles against Grimm. Another aspect could be the exploration of the characters' reactions to the sudden appearance of a Guyver - like entity in the RWBY world. Would they be in awe, or would they see it as a threat right away?
One interesting concept could be the reversal of character roles. For example, a usually timid character might become bold and a leader. Another could be the reversal of the power dynamics among the teams in RWBY.
One interesting concept is character crossovers. For example, seeing how characters from BlazBlue would interact with those from RWBY in a shared universe. They have different fighting styles and powers, so the battles or team - ups can be really exciting.
One interesting concept could be the combination of the unique abilities in RWBY, like semblances, with the powers of a Dragonborn. For example, a character might use their Dragonborn shouts in combat along with their RWBY - style weaponry. Another concept could be the cultural clash between the worlds of RWBY and the Dragonborn's realm. How would the RWBY characters react to the ancient Nordic - like cultures associated with the Dragonborn? Also, the idea of a character being both a Huntsman/Huntress and a Dragonborn, having to balance the two very different sets of responsibilities and powers, is quite fascinating.
Well, in Wolfenstein RWBY fanfiction, a cool concept is the character crossovers. Imagine Ruby Rose from RWBY getting her hands on some of the advanced weaponry from Wolfenstein. It could lead to some really exciting action scenes. Also, the moral and ethical themes from both universes could be blended. The fight against oppression in Wolfenstein and the hunt for justice in RWBY could create complex storylines where characters have to make tough decisions.
Well, in RWBY Starcraft fanfiction, the idea of RWBY characters being inserted into the Starcraft lore is really cool. For instance, Weiss could be a Terran noble who uses her Glyphs in combat, which would be a new form of technology in the Starcraft setting. Also, the concept of the four kingdoms in RWBY being related to different Starcraft factions. Maybe Vale could be like the Terrans, with their focus on technology and industry. It makes for really exciting and unique story ideas.
One interesting concept could be the combination of RWBY's unique semblances with Warhammer's vast array of powers and races. For example, seeing a character from RWBY use their semblance in the context of a Warhammer battle. Another concept might be the exploration of how RWBY characters would adapt to the often darker and more brutal world of Warhammer.