Personally, if there are any sequels to the game, I'd like them to potentially pull a Drakengard, say all routes are canon, and have different sequels follow up different endings. Someone in this thread suggested a spin off game focusing on Claude trying unify his homeland, that could be very fun and would let us see a completely different continent in the world. In some endings those who slither in the dark are destroyed, but in some they survive, so there could potentially be a sequel game focusing on defeating them as well. And so forth.