User blog comment:IamJakuhoRaikoben/Chapter 334: Sin and Sacrifice, Review./@comment-10425110-20130612085325/@comment-4829046-20130612105324

I didn't really get what you mean but I suppose my answer is that Engetsu and the real zangetsu are completely different. I suspect that his getsuga tenshou is merely Juha Bach giving him Isshin's ability rather than Ichigo's own ability. It will be very nice if Ichigo gains an all new ability just for him that is stark contrast to the powers given to him by Bach. And judging by the colour of his asauchi and the real zangetsu, I suspect that he will no longer be ALL black in his bankai form. Hell he might even unlock something higher than bankai since Hollows apparently have the ability to transform to an even higher level(Ulqiorra and Yami), and since his real zanpakutou is his hollow form fused with his shinigami powers, I suspect he would also become the true transcendent character in the series and ultimately defeat the reborn Bach.

But then again, this is Ichigo we are talking about, after all this is over, he would probably just return to his mundane life and go to college and forever ignore the fact that Orihime is in love with him. =P