I agree with the last part, none of us know. BTW, your speculating he said his name, as you also said, none of us know. I still like my theory of Obito's dad/or his eye or Obito's eye being used by someone we don't know.
Obito's dad would be old enough to fit the role, or his eye could have been harvested by Tobi and implanted. It being Obito's dad would be a good reason for him knowing about Kakashi's past
I think its highly probable that Obito's eye is being used by someone, and very unlikely that its Obito. If we know anything about the masked man its that he is a collector of Sharingan.