Latest manga showed zetsu was once again more than likely "filming" pains battles and handing them to tobi/madara, to see the fighting styles and weaknesses.
1.Tobi now knows narutos sage mode, its limits, and its weak points.
2.Tobi can copy any non bloodline limit jutsus thanks to his sharingan, i can see zetsus filming being a way for tobi/madara to steal all of akatsukis techniques.
3.Naruto said he could sense chakra in sage mode, but did not notice zetsu, meaning zetsu can hide even from sage mode abilities.
Personally zetsu is going to be a really big problem in future chapters, some only think him spy, i reckon he can fight better than most other akatsuki.
1.Tobi now knows narutos sage mode, its limits, and its weak points.
2.Tobi can copy any non bloodline limit jutsus thanks to his sharingan, i can see zetsus filming being a way for tobi/madara to steal all of akatsukis techniques.
3.Naruto said he could sense chakra in sage mode, but did not notice zetsu, meaning zetsu can hide even from sage mode abilities.
Personally zetsu is going to be a really big problem in future chapters, some only think him spy, i reckon he can fight better than most other akatsuki.