[DeathView]

Plot twist ////:O Aizen works for Urahara
..Not, But I was actually reading an inteeresting theory on it a week or two ago on another site

Seriously though, I can't see Aizen working for anyone...He seems far to conceited to work for any one, though its not arrogance really since he is the most powerful character in the show pretty much :/ randomly introducing some one stronger would be lame imo