Personally I think the same fate that happened to Kragaar will happen to Belkar. Which will make it look like he gets wiped out existence to the oracle and everyone else. But no one understands the snarl and what its effects really are. I don't think Kragaar is really dead either.

I also think it possible that when Belkar and the order goes into the timeless world beyond the rift, Belkar ends up voluntarily staying behind. Him and scruffy become some sort of guardians, and perhaps a quite literal sexy shoeless god of war.

I also think that it is relevant that Roy remembers what the oracle says. He wasn't supposed to remember. That bypassed the oracles security. This is going to become a plot point later. Roy's knowledge could help prevent Belkar's fate.