Originally Posted by Shino'sDad
The whole reason it should just be Obito is a reason that a lot of people are using as a point against it Just being Obito; the fact that young Obito and Naruto are both so similar in everything they do, say, and feel.
This manga, at it's barest and most base, is about a kid who has gone through hell his entire life, but refuses to give up, and has a dream that he won't let anyone get in the way of. It isn't about wars, or Ninjas, or Jutsu, or anything like that. It's about the growth of Naruto Uzumaki.
What does this have to do with Obito then? He is the perfect person to place opposite of Naruto. Throughout the manga, Naruto has encountered people who share similar qualities in him one way or another, though who usually have gone bad for one reason or another. Gaara shared a similar past to Naruto, though much worse, and became a villain because of it. Of course, Naruto was able to redeem him. The same can be said for Nagato, who's intentions were peace, but at a terrible cost.
Unfortunately, this simply means that Obito is another character who's intent is something they seem to think is Good, but ultimately seems bad because of the venue they choose to take in order to reach that point. Obito's sacrifice was ultimately in vain, Rin still died in the end, and that made him bitter. Was that the sole reason? No, more things had to happened, and I think we'll learn more this upcoming chapter. Obito is Naruto gone wrong, grown bitter, and willing to do whatever, no matter the consequences, in order to achieve his own personal peace. No more wars, no more fighting, no friends dying. Moon's Eye Plan is Human Instrumentality, the joining of all people into a single peaceful dream where pain no longer exists, and everyone is happy. Naruto has learned though through Nagato and others that pain is a necessary part of living. You can't have just the good and not any bad.