I dunno if to believe it or not. I've seen many fakes in my life (3 years ago I even made up some fake naruto spoilers ), so i can tell this interview is suspicious. the reasons why:
- It came out just before Tobi's face will be revealed. Seems like a bit of strange to be a coincidence...someone must have written this in order to create great excitation among fans, you know, for the fun of trolling.
- The interview is a bit too detailed. Kishimoto has always been very vague in his interviews. He never revealed too much, ever! If I were the author, I'd never reveal such things in the public, even if someone leaked the info before. Many people all around the world would have never heard about the leak of information, and by answering those two fans I would know the message would pread at speed of light in all the world, riuning everything with spoilers.
It just seems trange to me that in a moment like this, Tobi's identity would be leaked by chance, plus i'm convinced Kishimoto doesen't entrust just anyone with his secrets. His assistants are carefully chosen, and they're big friends with kishi. They know fully well how important is it to hide certain things, and would have never done it.
Tobi might be izuna, of course. He could be Obito...but I think there's more to Tobi than just the two of them. I'm convinced that there's something of Zetsu in Tobi and the person himself is made by half obito and half zetsu (or izuna). He's most likely an experiment of madara.