According to Adam Booth.

Not come out during the ringwalk?

Na, seriously though and considering he isn't going to outbox Wladm my theory is he's gonna come charging out at the sound of the first bell, like a released animal, giving Wlad absolutely no time to think and start throwing bombs in the hope of securing a very quick knock out. Wlad, obviously, doesn't like pressure but if Adam Booth doesn't thinks Wladimir will not anticipate this, he is very naive.