Byakuya's Final-form bankai is indeed awesome. :) Shows what magic animation can do to simple manga action scenes. I was awed at the beauty of Byakuya's bankai in the anime.. I wondered if Kubo-sensei would give Ichigo something as mind-blowing. XD
I agree with your idea of doing all the forms of senbonzakura. Especially the one with the thousand swords lined up all over a sphere. *_*