In this case you would have known it even if this wasn't a filler. There are few men who could beat Zaraki and some renegade shinigami who has spent his last hundred of years being brainwashed by bounto criminals isn't one of them.

However, despite the fact the outcome of the fight was highly predictable, it didn't make the fight any worse, if you kept that in mind. You just have to look at different things than who is the last man standing. The fact Ichinose tried his best made the fight worth it.