There was also a one-shot manga released by Tite Kubo involving Bleach, however it sparked huge debate, because;
1. It was friggin amazing.
2. It ended on a huge cliff hanger , which i wont spoil - and suggests that it may span into a new arc. No word yet from Tite.
It honestly surprises me that Tite doesn't just keep writing Bleach. His other mangas have been nowhere near as successful as Bleach was. I can understand the need for an artist to want to branch away from the 'norm' and avoid typecasting - but one should always stick to what they are good at imo.