good pointtobi have senju dna
1. Don't say anything you don't know. We thought that Madara died for long tiime ago, but after this chapter, it looks like Madara just died for 12 years ago. Madara had EMS, he could control the Kyuubi anyway. Tobi stated that Danzo wanted to control the Kyuubi, and since he wasnt an Uchiha, he needed both Senju and Uchiha DNA to control it. Tobi have MS, and I believe Senju and Uchiha could be enough to control it.-I don't think you need to have Senju DNA or be an Uchiha. Madara for one did not have Senju DNA when he attacked the 1st Hokage with the 9 tails. And Obito was shown only using a 3 tomoe sharigan.
-It would appear that all you need is a three tomoe sharigan or have wood release.
--Kakashi has master the sharigan better than even some Uchiha so I would guess he would be able to. I'm assuming the sharigan puts a powerful genjutsu on the 9 tails.
-So in the end Kakashi could control it just fine, but probably not for to long
Tobi have senju DNA
He implied he had Senju DNA when fighting Konan.When did obito get senju DNA? i dont remember this being said