This seems kinda spiteful.
The opposing team cannot kill him, most if not all could not get near him or even stand in his presence, he clearly can blitz anyone from the opposing side, and he can make them fight each other. In fact he could just draw his sword and not move a muscle thereafter. Or he could just bala nuke them. There are a ton of ways that Aizen could win this. Whitebeard is the only one that could last any decent length of time.