Going out of control sounds like some mindless animal.
The Juubi will be an intelligent creature, I can promise you that.
Which doesnt have to mean, that he cant get really mad and roar in anger

.
I agree that Madara and Obito overestimate themselfs.
They will be up for a big surprise.
Naruto having done fistbumps with the bijou and been given their names,
will most likely play a big role. It didnt just happened for the lolz.
It happened with a good reason.
It is shown in this manga, that trying to overpower bijou by force,
is not the way to go. The right path is the path Bee and Naruto too.
Which is why I got a bit annoyed by Naruto and Bee trying to blow up
the Juubi with a super bijou bomb. They shouldnt try to destroy it.