I feel the biggest problem with it is the inconsistencies in it.
Of course its going to eventually come down to a ichigo-aizen battle. Ichigo's the main character and aizen is the villain right?

But ichigo's strength in comparison to everyone else changes all the time. I mean, firstly he fights kenpachi, before the bankai. Then byakuya with the bankai. Each was a struggle but he wins. But then later on (don't ask me when as I can't remember) it's portrayed that he's a lot weaker than the captains? Don't really get it.