A common theme is the clash of different worlds. Red Hood comes from his own universe with its own set of rules, and RWBY has its unique world - building. So, stories often explore how he navigates this new world. For example, dealing with Grimm which he has no prior experience with.
Well, it could be about Red Hood getting transported to the RWBY world. He might team up with Ruby and the gang against some common enemy like Salem. His combat skills and no - nonsense attitude would be a great addition to the RWBY team.
One common theme is the idea of a journey. Just like in the original Little Red Riding Hood story, the characters in RWBY - inspired versions often have to travel through a dangerous world, which in RWBY is filled with Grimm. Another theme is the concept of deception. There could be characters who seem friendly but are actually hiding malicious intentions, much like the wolf in the original tale.
One great 'Red Hood and RWBY' fanfiction is 'Red Hood in Remnant' on FanFiction.net. It has an interesting plot where Red Hood finds himself in the RWBY universe and has to adapt to the new world and its rules.
His motivation could be related to a difference in ideology. Red Hood has a more brutal approach to crime - fighting compared to Nightwing. He might think that Nightwing's methods are too soft and by kidnapping him, he wants to force Nightwing to see things his way.
It could be someone manipulating Red Hood. For instance, a powerful crime lord who has some dirt on Red Hood and forces him to kidnap Nightwing. So, in a sense, this crime lord would be the real villain.
There's also 'The Huntress in the Hood'. This fanfic delves deep into the idea of a RWBY character taking on the role of Little Red Riding Hood. It has a great plot where the character has to outwit Grimm that are lurking in the forest, much like the wolf in the original story. The author does an amazing job of describing the action scenes and the character's growth throughout the story.
Another interesting interaction could be between Red Hood and Blake. Blake, with her Faunus background and her own complex views on justice, could have some really deep conversations with Red Hood. They might debate on when it's okay to take extreme measures in the name of justice.
One common theme is the idea of danger in the forest. Just like in the original Little Red Riding Hood, the RWBY characters often face threats in a forest - like setting. In the RWBY universe, these threats could be Grimm.
In Marvel fanfiction, Red Hood can be re - imagined in various ways. He could be given new powers or have different relationships with existing Marvel characters. For example, his interactions with the Avengers or other street - level heroes like Daredevil can create interesting storylines. His backstory might also be tweaked to better fit into the Marvel narrative.