I have high expectations in this arc (just like the Amagai Sucksuke Arc). However... they both did start off good in the beginning and then one of them ended up being so bad that I wish it didn't even exist in the first place. Still, the concept of the arc is somewhat questionable. I thought of Soul Slayers to be partners that shared close bonds with their Death God masters. Why would they want to revolt now? They were always fighting together and helping each other out, unless the Soul Slayers harbored a deep hatred for their Death God counterpart for a quite a long time. In any rate, only Ichigo and Zangetsu will probably be still partners in action, since I don't see Zangetsu betraying Ichigo soon.