User blog comment:Xilinoc/Ch. 561 - THE VILLAN/@comment-6916556-20131211073838/@comment-2211792-20131211080450

Renji will be the final villain. Remember Byakuya's tale about monkey and the moon? It was foreshadowing! The final battle of Bleach will be Renji vs. Ichigo!

Seriously, though, it certainly can't mean Quincies are the ones who are rightful. Renji's words may be echoing Kyoraku's opinion on war, however ("both sides are evil").