User blog comment:Maggosh/Predicting Volume 46/@comment-1454424-20100527172944

It is true, I have been trying not to look at Aizen since he became gross.

I also wanted to point out that the "End of Hypnosis" chapters were mostly about Aizen as well. But it was Gin who was on the cover of Volume 20: End of Hypnosis. In addition, Yammy was on the cover of volume 41 when he total appearance in the volume didn't amount to much. However, Yammy released in the Heart chapter and Kubo clearly thought that was enough to give him the cover. Alternatively, Kubo found Yammy more interesting to draw.

Whichever way, Gin released his bankai during the Deicide chapters and the chapters being Aizen-centric didn't stop Gin from getting the cover last time. So, the past pattern of volume cover selection still favours Gin.