I have made threads saying that Obito will betray Madara, or they won't simply work as a team and split... In another thread I said Sasuke could become Jinchuuriki for the 10 tails....
Nice theory as always, this time you added a sound to it to make it even better and it worked. And yeah we weren't revealed what Obito intended to do with Sasuke, he also didn't want to give it to Kabuto, but had to negotiate....
But as we can see, Obito doesn't like Madara, and he'll soon or later know that Madara was involved in rin's death, even if no one tell him that, he still wouldn't sacrifice himself for madara... So the problem with casting the genjutsu is the allied shinobi alliance, which would meddle while Madara would be carrying on the plan as it takes ages to summon something... Sasuke could get senju dna and be able to bring madara back but then I don't think sasuke would just sacrifice his life... but what if the told him that they would brinng itachi back in their genjutsu and have a better life with not so much pain??
hmmm