What bosses you expect in DkSII

A better version of the Hydra. Make it so all the heads don't do the same attack at the same time. Say some spit at you while the remaining heads attack, or something like that. The idea being that you're close to constantly moving instead of blocking while the heads lunge in and then all your do is hack away.

I want to fight a gigantic mob. Picture the Channellers mob in the Parish times twenty.

That's it. To get to the final boss you have to fight through a multi-storied building (like Bruce Lee's "Game of Death") which is overflowing with tremendous mobs of small enemies. Then, after that is finished, you have to face the final boss, and hopefully you have some estus left.

a refined kalameet, you know it'll happen haha

This may not fit in a DkS game, but indulge me a little.
Imagine if some bosses where in the style of Shadow of the Colossus and are enormous in size and you can climb them to get a critical hit on them.
Not exactly like SotC, you wont be limited to only climbing them to get damage, but having the option, or even a hidden option of climbing them.
I know this wont happen and isn't quite Souls series style, but man it would be fun.

from what I've seen we're finally gonna get a real forest so I wanna fight Bigfoot!