thisI swear you have to know the name of your zampaktou in order to use its special technique?? so isnt it pretty obvious ichigo will be able to use bankai at some point?? however, his strength may be similar to Isshin's as im assuming he used his final getsuga tenshou and lost his powers and after regaining them he was actually on par with Aizen. lets not forget the middle finger flick that sent him flying through a couple buildings lol. anyway get my drift?
Why even ask something like that? Of course he can, I don't see a reason why he couldn't.