Madara has Rinnegan... So does Obito...
Why can't he just tell Obito to take the Juubi somewhere, and then:
Obito could even come back, and help him doing that, but it wouldn't be needed. Tsunade it's not there to use her slug.
Kakashi can now use his MS better but still wouldn't be able to take many people, just a few of them...
Not sure how well Obito could do the Shinra Tensei with only one eye, but if he can have a six paths of the 2-7 tails Jinchuuriki and their Bijuu, certainly could do a shinra tensei right? So then he would that in the other dimension, just in case Kakashi takes people there, they won't be safe too!
They are badboys after all
Damn it's the Uuuu.......chihaaa
♫ ♫ ♫ ♫ ♫ ♫ ♫ ♫ ♫ ♫ Bad boys, bad boys, what you gonna do? Whatcha gonna do? When they come for you... ♫ ♫ ♫ ♫ ♫ ♫ ♫ ♫ ♫ ♫