Don't forget all the poeple that are still missing. Isshin wasn't the last to come out of nowhere, so it's gonna be much longer than 3 chapters.
Makes you think. If everyone who's against Aizen would've been there from the start, they might've made a bigger impact. Survived the fights against his underlings with much less casulties and in better shape, and then gang up on him. Not that it would've worked, since Aizen is obviously unbeatable. But still, people showing up late and going at him one at a time is a waste of time.
"For Feanor was made the mightiest in all parts of body and mind, in valour, in endurance, in beauty, in understanding, in skill, in strength and subtlety alike, of all the Children of Illuvatar, and a bright flame was in him"