Naruto Chapter 559

[6Zabuza9]

It can't be Obito. Tobi was fought the Fourth when Naruto was born and the Nine Tails attacked. Obito would have been around 14 years old during that time. Clearly even with the mask Tobi looked over 14 years old while fighting the Fourth unless he suddenly grew like 2 feet, learn new techniques that rival the Fourth, and found new hatred for Konoha all within a year from his death.

[toonice714]

It can't be Obito. Tobi was fought the Fourth when Naruto was born and the Nine Tails attacked. Obito would have been around 14 years old during that time. Clearly even with the mask Tobi looked over 14 years old while fighting the Fourth unless he suddenly grew like 2 feet, learn new techniques that rival the Fourth, and found new hatred for Konoha all within a year from his death.

I was literally coming back to post exactly this....sheesh.
But yeah it can't be obito. Ruling out all possible uchiha/and look alikes: none of sasuke's family, obito, danzou, shisui, or the original madara(b/c it has brought him back to his body's last state. B/c seriously anime characters only cut their hair at important plot points like time skips or other events). Also the uchiha police can't be involved b/c they were all massacred by itachi and the now fake madara. So that totally leave the window open for madara's brother I guess. Thoughts gentlemen?