Poll
83%
17%
I guess that's the key. Is the Crow's, well, crow, going to be near by when they fight, or is it going to be down in Brazil checking out women in thongs while GR and the Crow fight in Detroit? If the bird is near by, I'm pretty sure GR could see the connection between the Crow and, uh, the Crow (bird), and throw a spiked chain or a blast of hell fire at it, or at least clip it's wing so it would be grounded and he can run it over with his bike.
Other than that, it's pretty much a stalemate unless the Crow's Crow is either Heckel and Jeckel or Elvis and Pappy from the Bugs Bunny cartoons and can actually speak, and then somehow finds the spell to excorcise the demon from GR and uses it.