I know that. It was stated only 2 chapters ago. Let me rephrase that, will Itachi be able to disable it before Kabuto dies? If Itachi is close to winning, its most likely that Kabuto will kill himself before disabling it, judging from this pity party flashback.
I don't see Kabuto killing himself.
1. He is too full of himself and too smart to go out that way.
2. I doubt the Edo Tensei was the only trick up his sleeve.
3. Do you really think Kabuto wasted all that time training and gaining all these new abilities so he could kill himself at the first chance his back is to the wall. No way, he is probably going to go down fighting to his last breath.
I think that Itachi will succeed in making Kabuto release the Edo-tensei but that he will escape, though I do not know what would make him unable to just cast it again.
He wouldn't be able to bring back all those Edo Tensei again. While yes he could cast it again, he won't have as strong an army as he does now seeing how most of the souls were either sealed or moved on on their own. And you can't bring back a soul that has moved on, only the souls stuck in Limbo. (I think.)
That plus all the ones sealed in the Demon and other means probably won't be getting those back.