Mmmmm. Such a good chapter. There are two possibilities for who the shadow could be. Its probably Sasuke but this anime is definitely unpredictable in many ways, so it could also be Izuna Uchiha who looks ridiculously alike to Sasuke. If it ends up being Izuna, its either one of Kabuto's summons and he's dead, or he was alive all of this time and I have NO idea what he'll do next. Its possible that if its Izuna we would have a 2 on 2 when Sasuke arrived, perhaps with Izuna and Sasuke trying to kill Kabuto to preserve Itachi and Madera. idk. Izuna is unlikely but worth mentioning.
If its Sasuke, I think he will try to kill Kabuto in order to preserve the jutsu and keep Itachi "alive." There will be some dialogue as Itachi defends Kabuto and he'll end up saying something predictable like "I will protect the leaf village no matter what, even if I have to kill you." Maybe even throw in a "thats my ninja way" to make him think of Naruto. That will be Sasuke's turning point and they'll team up and overcome Kabuto/the jutsu. I think its clear that Itachi will somehow have to sacrifice himself to make all of this work, and Sasuke will go off and eventually encounter Naruto/Tobi's fight.
Tsunade is not dead. I think that's very clear. I think she WILL die in this fight, but I believe she has a reason to have been hit by that attack. Dan or w/e her husband's name is might play a big role in the fight at some point, since they've had a few scenes with him.
Naruto will obviously win his fight eventually. Not sure how Sasuke will be involved though. I think its obvious he will be. I am almost certain that by the end of the show Sasuke will have turned again, but I'm not sure how it will be done, and I think he'll end up dying. We may get a classic darth vadar sacrifice to save Naruto and Konoha. I think this is the last or second to last arc, so its coming soon.
I also don't think we've seen the end of Black Zetsu. EVERYONE wants to know whats up with Zetsu cuz he's so weird. It would be very disappointing if we didn't get to see him fight. He wasn't dead when we last saw him, he was just unable to move.
idk those are my predictions. tell me what you think