Sasuke is Orochimaru's boss!
The new addition to Taka is Orochimaru and everything he brings to the table, including all of Konoha's previous Hokage!
Some of you might think that now he has his arms and he will have a good shot at taking Sasuke's body, WRONG!!
Wanna know why?
Because last time Orochimaru did that, he failed, miserably!
Whether he was sick and weakened and missing his arms DID NOT MATTER AFTER HE CAUGHT SASUKE IN HIS IMMORTALITY JUTSU AND PERFORMED THE RITUAL!!
That's right, Sasuke was still subjected to the ritual regardless of anything else, and inside the Ritual, Orochimaru is the boss, he owns it because he created that space.
Sasuke turned Orochimaru's own creation against him with his eyes and sinister chakra.
Now that Orochimaru has his arms, it's not going to make a shred of a difference, because Sasuke's chakra and eyes have got even more sinister and powerful since that time!
And you know this!
Therefore Sasuke now indefinitely owns the Edo Hokage as well. He will most likely go and help Naruto with them and Taka.