Well yes and no. I mean, he had to be rezzed first, then he had to get his various eyes back after being truly brought back and not just an edo tensei under his own control. He could have laid the smacketh down (if I may borrow from the Rock) on everyone before then (in fact he totally had done so) but the whole ripping out of the biju part kinda had to wait till now from what I understand. I mean heck, naruto had only just ripped the biju out of obito like 10 minutes ago (or thirty hours if you include flashbacks)