User blog comment:Captain Brooks/My thoughts on Aizen sama./@comment-1740937-20100526004245

I sincerely doubt that there will be any background arc for Aizen; no matter how much I would like to see it. I mean, for me, part of the reason that I like Aizen and his plan to ascend above the King of the Soul Society is that it apparently has come from no where. No stimulus; just to be the God of the world. If it had a root cause;

1) It'd be very hard for KT to imagine a single stimulus triggering the power-hungry Aizen we know today

2) He'll just be another Villain from other shows, who are shown to be good guys gone bad. Cliche.

However, I'm not too sure if Aizen is overpowered. Sure, his Zanpaktou's power is pretty much overpowered - I agree on that point - but he has been shown to be damageable. He got injured by Ichigo, perhaps by Shinji, and we know that Isshin caused much harm to him for him to reveal his master stroke; the Hogyoku. This also raises the point of that, if he were invincible, why would he even need the Hogyoku lodged in his chest?

However, back onto his Zanpaktou. This may be a crackpot theory, but I wouldn't be surprised if he doesn't even possess a Bankai. Before you all scream at me "He's a Captain! He must have a Bankai!" think about it. He lied about his original Shikai's ability by using Kyoka Suigetsu's ability. It's not beyond him to use that same trick again in order for him to gain the Captaincy which would give him much standing in the Soul Society, as such free to reveal his Zanpaktou to the other Captains and Lieutenants. Besides, him being the arrogant person that he is, he might have felt that learning Bankai would only just be a waste for him to learn, and spent most of his time recruiting Gin and Tosen, and testing out his Hollowfication process.

Also, just because he beat most of the Vizards with ease doesn't make him overpowered. It just exacerbates the fact that the Vizards were complete trash. The only one who was needed in the Winter War was Hachi - who absolutely owned Barragan. The others weren't needed;

Hiyori and Lisa) Went to help Toshiro. Didn't do much. Aizen killed Tia. Love and Rose) Went to help Shunsui. Got owned by Starkk. Shunsui owned Starkk. Kensei and Mashiro) Fought against Wonderweiss. Mashiro lost the forgettable battle, due to her arrogance. Kensei; we have to presume that he lost against Wonderweiss; seeing as he released Bankai before Wonderweiss even released his. Shinji)Fought against Aizen. Okay, he slowed Aizen down. Slightly. But he just got carved down. Ichigo) Currently getting owned by Gin.

So yeah, Aizen didn't really have much to worry about with these losers.