@SpeedForceSpider: I think you should take out reiatsu crushing.... just saying.
I kinda see Byakuya winning and not (IMO Zoro will give him hell) by using cheap tricks like Bakudo #61... then using Bankai. Kinda like what he did to Renji, but Zoro could break out by sheer force. I remember Kensei braking out of one by physical strength... it should be the same for Zoro since he is pretty damn strong. and when he does... he could slash Byakuya's head off.. lol I hope this makes sense.
idk about Sasuke tho.. sorry.