Aizen isn't God. Well let me clarify that so my input can be understood. Tite Kubo=God of bleachverse. And since Tite personally protects Ichigo then I guess its
Ichigo+author's personal plot-armor >Aizen
Back to the topic though, Aizen brutally stomps! In fact the only reason Yamamoto has anything on him is because of his +2000 years of experience.
Aizen is so fast that Kenpachi will not be able to keep up, at all. Since Aizen has more than enough rieryoku to injur Kenpachi, this is like a slaughter.
Sorry about that previous post up there but I got carried away. But since Aizen is maxed out in everything why would he even need high level kido? He could just use a low-level spell and still win with even less effort.
"To all visitors from Transylvania looking for the head of Voivode Dracula: Yes, we have it. Yes, he's dead. No, you cannot see it. No, he will not return and invade you again. It has been over thirty years, please stop pestering us."
Gender: Male Location: Killin zombies with Post-it notes
Indeed, that and Kempachi has no knowledge of kidô.
__________________ "My actions have nothing to do with Shinigami protocol... I've rescinded your right to live... because you aspired to cut my pride... with such a dull blade."--Byakuya Kuchiki
Gender: Male Location: Killin zombies with Post-it notes
In other words Aizen hacks a giant reiatsu luggie and Kempachi drowns in it.
__________________ "My actions have nothing to do with Shinigami protocol... I've rescinded your right to live... because you aspired to cut my pride... with such a dull blade."--Byakuya Kuchiki