User blog comment:Godisme/The Fire 2/@comment-3428301-20120905154348

Here are the things we know so far 1. Ichigo's bankai cannot be stolen: There are several theories that I have heard explaining this fact but there is one that seems most likely is because unlike all that bankai's that have been stolen so far ( Byakuya, Soifong, Hitsugaya, Komamura and Sasakibe) All have one thing in common, they do not effect the user directly but gives them a stronger weapon,  remember Ichigo's bankai affects his speed and power rather then giving him a grandious over the top power

2. The Vandenreich leader has a grudge against Yamamoto: I really don't think that the leader will allow his subordinates to steal his bankai before fighting him first, remember this is a grudge that has been carried for hundreds (thousands?) of years that was carried out on the order of the man who he is now fighting, plan or not I don't think he'd want to fight such an enemy that way