User blog comment:Xilinoc/Ch. 558 - The Heart of the Wolf/@comment-3536902-20131120080923/@comment-11051098-20131120183544

Even though the RG is tasked with the protection of the Soul King, and the protection of Seireitei is in the hands of the Gotei 13, I can't imagine that the RG would stand by and watch the Gotei get annihilated and the world collapse. They should help out, if only to reveal their Bankais, as Kubo said he would reveal all Bankais in this arc.

What would be the point in creating new characters only to play them half-way?