Itachi seems like he would give ANYONE problems. Just another character that is too strong to survive into the latter part of the story. There would be no growth for the other characters. It's just good to see madara taking damage bc for a moment he seemed pretty untouchable.
Well naruto is awake so I guess sasuke will also make his return to the battle. Bringing kabuto into the fray would also move this battle closer to completion. His sage techniques will really come in handy. Orochimaru and Karin wouldn't hurt either at this point. Crazy thing is that this is the first time I've ever considered Karin the most useful out of that 3-man cell