Board Thread:Theories and Speculation/@comment-33953813-20171226015659/@comment-28819877-20180103204648

Thekillman wrote: He was strong enough to control TTJ Double rinnegan Rinnesharingan Madara. So yea, he could control Obito.

Madara was caught off-guard by BZ and also he got weaker after using IT at some degree (bags under his eyes after IT clearly indicates that).

Obito wouldn`t have let BZ even to get close to him if the latter had tried to overpower Obito (however, it could have happened due to Obito`s arrogance since getting that power). Even if BZ actually could do it, I assume he would have accomplished his goals via Obito instead of Madara then (which left Madara behind anyway).