Tobi/Madara aka the masked man was revealed to be
This was revealed in the Fourth Great Ninja War but I cannot how the masked man could control the nine tails? At that time, Kakashi, Guy and his other peers were 15 years old more or less, he should also be around that age. Why do we see that the masked man is around Minato's height?
Note: Minato was at this time a full grown adult in his 20s.
Even for a very skilled shinobi, I believe it's impossible to learn so much in just 2 years. Obito was about 13 and a mediocre ninja when he was presumed dead in Konoha and encountered Madara. Now, I know many of you might say that he was taught by Madara but at that time Madara was himself and his 80s, very weak, and his life was attached to the Gedo statue. Now in the battle between the masked man and Minato we clearly see that when Minato hits the rasengan to the masked man a whitish DNA sort of thing drips from his arm. That could have been Obito's senju DNA as his original right body was crushed but now I couldn't agree to this because of the first paragraph. Perhaps I am missing something else.