There could be. Fanfic writers are very creative and love to combine different fictional worlds. Since RWBY, Naruto, and Gwen are from different and interesting universes, it's not impossible for someone to have written a crossover fanfic. But you'll need to do some thorough searching. Check not only the big fanfic sites but also some smaller, more niche ones dedicated to these particular fandoms.
One possible plot could be that there is a rift in the multiverse that pulls Gwen from her world, Ruby, Weiss, Blake, and Yang from RWBY, and Naruto from his ninja world into a single new realm. They must then figure out how to get back to their own worlds while also dealing with threats specific to this new realm. Maybe there are powerful entities that want to use their unique abilities for their own evil purposes.
In a fanfiction, their relationship could also be explored in terms of leadership. Naruto has led his team in many battles and has a sense of responsibility towards his comrades. Raven has her own group and her own way of leading. They could compare and contrast their leadership styles. Maybe they would have some disagreements at first, but as they get to know each other better, they could find a middle ground and lead a combined force against a greater threat in the RWBY universe.
One idea could be that Naruto characters are transported to the RWBY world. Naruto himself could befriend Ruby and they could learn from each other's combat styles. For example, Naruto's chakra control might inspire Ruby to better control her own energy. Another plot could involve the Akatsuki from Naruto being interested in the Dust in RWBY's world and causing chaos to obtain it.
Naruto and Ruby would be an interesting pairing. Naruto's positive attitude and never - give - up spirit could mesh well with Ruby's determination. They could both inspire each other in combat and in their personal growth. Another good pairing could be Sasuke and Blake. Sasuke's brooding nature and his search for power could be contrasted with Blake's own past and her fight for equality. They could have some deep conversations about their motives and past traumas.
Well, 'wolfenstein crossover rwby fanfic' probably features a crossover of storylines. For example, the technology and alternate history aspects of Wolfenstein might be blended with the magical and anime - inspired world of RWBY. The fanfic could explore how the heroes and villains from both would react to each other's worlds. It might also play with the different power systems, like the Dust in RWBY and the advanced weaponry in Wolfenstein.
One common theme is power combination. For example, when RWBY characters cross over with characters from other universes like in 'RWBY x Avatar: The Last Airbender', they combine their powers. Ruby's speed could be enhanced with airbending techniques.
Perhaps in the fanfic, Captain America's shield could be modified with Dust technology in the RWBY world. He might also have to adjust to the different fighting styles and powers of the RWBY characters. For example, learning about Aura and Semblances and how they can be used in combination with his own abilities in combat.
Naruto could be a mentor - like figure. His experience with different types of combat and his rinnegan - enhanced perception would allow him to guide the RWBY characters in battles. He might help Ruby improve her scythe - wielding skills by teaching her some of his sword - fighting techniques that he learned from Sasuke.
The fanfiction of Naruto, Sparda, and RWBY also offers a chance to play with different settings. RWBY's post - apocalyptic - like world, Naruto's ninja villages, and the demon - infested world of Sparda. By merging these settings, authors can create entirely new and immersive environments for their stories, full of adventure and mystery.