Another plot could be that the wolf pack is actually a group of transformed Huntsmen and Huntresses who were cursed. Ruby, with her pure heart and determination, tries to find a way to break the curse while also dealing with the challenges of keeping their secret from the rest of the RWBY world. She could face internal struggles within the pack as some members are more accepting of their new forms than others.
One idea could be Ruby meeting a wolf Faunus who is initially mistrusted by the group but later proves to be an ally. Maybe the wolf Faunus has a special ability related to tracking that helps Ruby and her team in a mission. Another plot could involve a wolf Faunus who is being hunted by some anti - Faunus group and Ruby decides to protect them, which leads to a series of battles and the exploration of the discrimination against Faunus in the RWBY universe.
One idea could be Ruby adjusting to her new cyborg body and the enhanced abilities it gives her, like super - strength or advanced weaponry integration. Another could be her facing discrimination from some in the RWBY world who fear or mistrust cyborgs.
One plot idea could be Ruby discovering she has werewolf abilities during a mission. She has to learn to control it while still fighting Grimm. Another could be that in a werewolf form, Ruby has enhanced senses that help her track down a powerful and elusive enemy. Or perhaps she forms a pack with some of her friends who also get werewolf-like powers and they have to protect Vale from a new werewolf - Grimm hybrid threat.
One idea could be Ruby discovering she has some cheetah - like abilities. Maybe she's faster than ever and has to learn how to control this new power. It could add an interesting dynamic to her combat style and how she interacts with her team.
One idea could be that Ruby and Coco team up for a special mission in a dangerous, uncharted part of Remnant. They face new Grimm and have to rely on each other's unique skills to survive. Coco's fashion - sense - related weaponry could combine with Ruby's speed and scythe skills in interesting combat sequences.
A really interesting plot would be if Ruby's Reaper form was somehow connected to an ancient prophecy in the RWBY world. Maybe it was foretold that a Reaper - like figure would either save or doom Remnant. This would put Ruby in a very difficult position, with different factions having different views on her and her new form. Also, a plot where Ruby has to team up with some unlikely allies while in her Reaper form to take on a common threat could be cool. These allies could be former villains who see the greater danger that requires Ruby's power.
One idea could be Ruby having to relearn her combat skills while being deaged. It would add an element of struggle and growth as she tries to regain her former abilities. Maybe she forms new friendships with characters she already knew in a different way because of her new, younger perspective.
One plot idea could be Ruby discovers she has werewolf abilities during a mission in a forest. She has to learn to control it while still fighting the Grimm. Another could be that there's a curse in Beacon Academy that turns Ruby into a werewolf, and her friends have to find a way to break the curse without hurting her.
A third plot idea could be Ruby having to face an ancient vampire threat that is related to her new condition. Maybe she discovers that she was turned into a vampire as part of a bigger plan by an evil vampire lord, and she has to stop this villain while also coming to terms with her own vampirism. This could involve her learning about vampire lore and using it to her advantage.
A new group of Grimm hybrids created by Salem could be the main antagonists. These hybrids could be specifically designed to hunt down the wolf pack. They would have the intelligence of humans (from Salem's influence) and the ferocity of Grimm. The wolf pack, led by Ruby, would have to figure out the weaknesses of these new enemies and fight to protect themselves and the people of Remnant.