Naruto Thread (Spoilers For Sure)

Oh. Kabutos back.

Good! Have him grab a near dead person, use them to revive itachi again (which will be fine, because his eyes would be back to how they were when he died, same as Nagato), get madara in izanami, everything is done with. Either he reforms like kabuto has, or he is trapped in the genjutsu forever.
Also, just to be sure, stab him a few times while he's in the unescapeable genjutsu.

I sometimes wonder what manga writers are thinking when they make these ridiculous gamebreaker powers.

There is a huge difference between Madara and Kabuto for that genjutsu to work. Madara isn't being manipulated and he knows that he is Madara Uchiha. Whereas Kabuto wanted to be Orochimaru or anything that was more powerful than him, so you could say that Madara is a solid rock and Kabuto a jelly in mind status. So, Izanami isn't going to work with Madara.

Now, reviving itachi to use the Tousuka sword, is another different story.