Re: interesting madara/tobi opinion
I won't go into whether he is really Madara, but he did use the name "Tobi", so Zetsu calls him that way. It could be that Zetsu likes that nickname. Zetsu is the closest associate of Madara/Tobi so either he calls him Tobi because Zetsu knows the guy is not really Madara, or he calls him Tobi because he likes to call him that way or is used to calling him that way.
The great off panel war has begun...also called the war of one panel because most fights started and ended in one panel.