Yeah this is so fucking weird. It'd be one thing if they were grudgingly working together but they are almost fucking quippy, like Spider-man and Human Torch teaming up. Maybe we can write it off as how insane Sasuke is, that as soon as he sees a living Itachi his mind switches gears. Not that I have a problem with this chapter on that account. It's so rare to see anyone in the series actually do something ninjalike, so watching Kabuto desperately try to beat these invincible badasses is entertaining.