User blog comment:Xilinoc/Ch. 567 (Rukia be like "I ain't even scared though")/@comment-5147109-20140207231148/@comment-5147109-20140207232246

It does kind of make sense though if you think about it, they have pretty much been a team since the very beginning and it would be almost poetic if it takes them combining their strength and powers to take down the final and most powerful villain of the entire series.