ok clearing up the confusion....sure it might be cannon, BUT, because it is for the game, the budget is lower for the cutscenes than it is for the anime....you could even tell in the overall quality of it.....which is why didn't didn't see things like susanoo or much of anything for that matter.....just a bunch of hacking/slashing, some generic wood technique and one nine-tails blast. There was also no blood on their faces or anything
It still was cool, but it was solely made for the purpose of conveying the basic outcome of the battle for the game.
When they show it in the anime, it will be a lot better and longer.