User blog comment:Forrestib/Crossover/@comment-25555436-20141220042621

If my idea of my own show, Judgement, became reality, RWBY could easily do a crossover with it....actually, anything could do a crossover in Judgement, if it existed.

In fact, I even have the concept for Ruby's role in Judgement. Even thought of an arc that could involve Remnant. And no, her role wouldn't be for just 1 episode, it would be closer to main character.

However, my idea is just that, an idea. So, I'll pick something that exists by now:

Mmm....Kingdom Hearts, maybe. The Grimm are pretty much like the Heartless, in a way. Or maybe Kill La Kill? Soul Eater? I don't really know what could work with RWBY.