Spoiler alert! I read last week's Bleach manga and at the end it showed Tosen taking about a "greater power" and then reaching his hand to his face like a Vaizard does when he puts his mask on. Do you think he was given Vaizard powers?
Just like the guy above me, we'll figure it out later. However it looks ideal that that could potentially happen. A power greater than that of Bankai!! =O