Thats not what I mean. I meant that Aizen is a supporting character in a sub plot attached to the main plot. The main plot could continue with out his sub plot but would be more boring. I was trying to explain that it is the sub plots and supporting characters, though their involvement could be cut out and the story would continue, are what make the story fun.An no aizen is important to the plot they will need his help to defeat Bach or to do something to the soul king an keep him intact...as Juno said in his interview aizen has a major role to play in this last arc.