Board Thread:General Discussion/@comment-10587310-20130620070434/@comment-4957813-20140108212547

Hitsuyorui2014 wrote: i think that renji, rukia, and ichigo learn how to surpress the bankai stage of the zanpakuto like a bankai 2nd stage the ultimate final stage of zanpakuto maybe renji new bankai will allow him wings to fly like it could be daiguren hihio zabumaru or something.

Okay, there is no such thing as a Bankai 2nd Stage. The ultimate form was only used by Ichigo, and it came with the consequence of him losing his Shinigami powers.

As for your theory on Renji, that is the most ridiculous one I have ever heard, there is nothing in the series to support it.