I've got a few ideas for stories that I don't have the time to write, so I'm opening these up for people who want to make these happen. PM me if any of these sound like something you'd want to work with me on.

Fire Emblem: Three Houses X RWBY Crossover (Verdant Star of Remnant): After the Battle of Garreg Mach at the end of the school phase, Byleth (female) falls off the cliff. Sothis, desperate to save her, accidentally uses her power to send Byleth to Remnant, and they are physically separated, allowing Sothis to have her own body. They wake up in the Emerald Forest, and are found by Team RWBY. (Adopted by BardockSkywalker1991)

Fire Emblem Awakening X RWBY Crossover (No title yet): Time travel doesn't always go as planned. Instead of winding up in the past, Lucina, Severa, Owain, and Inigo accidentally end up on Remnant.

Tales Series X RWBY Crossover (No title yet): A re-telling of the events of RWBY, but several characters from throughout the Tales Series were born on Remnant. For example, Cheria is Klein's daughter and works as a maid for the Schnee family, is Weiss's only friend, and goes to Beacon with her. As another example, Milla is Yang's twin sister. Tales villains would also exist in this world, and ideally they would be the villains of this story alongside Salem.

Final Fantasy XV X RWBY Crossover (No title yet): King Regis, in an attempt to save Noctis from his ultimate destiny, uses the power of the Crystal to send the infant Prince to another world, that world being Remnant. He is adopted into the Schnee Family, and attends Beacon with Weiss. But, he and Weiss don't like each other very much. Things change when Ardyn shows up looking for Noctis.

RWBY Fanfiction (No title yet): After being denied training by his family, Jaune meets a traveling girl named Amber. She agrees to train him, and the two eventually fall in love, only to separate when he has to go to Beacon while she continues travelling. Then she's attacked, and Ozpin's inner circle learns of their relationship when Amber's condition becomes complicated.