We don't know if Tobi has the MS but we know that he is a uchiha
I wouldn't go so far as to say he is an uchiha. Uchiha's are a very proud arrogant lineage. Take sasuke and madara for example. They act high and mighty and never scared of combat unlike tobi. I'm not saying tobi is scared of combat, its just he acts very different then an "elite" (obito reference) uchiha. Also he has zetsu like body parts on him, that's not really normal for an uchiha lol.
I said he is an uchiha because in the fight with Konan he had a sharingan in both eyes
btw i think he is Madara and the white substance that looked like Zetsu's white side has something to do with that xd:shrug:
Or if he is Uchiha Kagami as some say then that support your theory because he and Danzo know each other long ago![]()