I'm kinda confused...

[Edex]

What made Sasuke do all of this and why not lock up Naruto like he did with the rest of the tailed beast? Is sasuke pretty much madara now?

 

[Lord madara solos]

if sasuage wanna be like lord madara then he can do it inside IT

 

[Urda]

It is not enough to contain Naruto.

 

[Zantos]

the main reason he could contain bijuus in CT was that he first put them under his control via genjutsu , so they can not resist and come out !