User blog comment:TVthePunisher/Isshin and Masaki - Just a Theory/@comment-44061-20100531195340

Deicide is defined as the killing of a god. As made a point there are no gods that there are no gods other then the Shinigami, the gods of death. On that note Aizen actually says that there is no gods sitting on the throne of heaven and he will take that vacant throne. He acts arrogant enough to believe his power is on par with a god which is questionable as its not on his own but outside intervention of someone else's creation (thhe hogyoku). On that note check the fight Yamamoto was the one that won he wasn't brought down by WW or even really Aizen, he took himself out of the fight. Though your ending concept may hold truth to it. Deicide may allude to the death of Aizen as a would be god or may actually refer to the death of Gin whose bankai name is in reference to a god-killing spear. Small arcs are also more geared toward flashback stories. So in the finished statement you are most likely correct.