Obito never wanted Madara to Return
Something has become clear to me: Obito Uchiha will not use Rinne Tensei No Jutsu on Madara Uchiha or any given person, especially Madara, because Obito hates or at least strongly dislikes that man, and does not likely trust him.
Here he talks about how Madara is making sure he doesn't get Obito killed, and Obito is being his usual smart-mouth self, mocking Madara.
I get the impression from these words with today's context that Obito never truly intended to revive Madara, with the following link in mind...
Obito makes it plain as day that he originally planned to use Pain to accomplish his dream or Sasuke... He never has shown an intent on reviving Madara...
One element that could change this though is that Obito has become a bit more crazy than usual and is only getting worse... Just recently he kind of tried to murder the entire alliance and possibly himself.