How Come Until Now?

Summary
Kakashi and Guy are shocked, and start asking if he really is Obito. Seeing his Mangekyou Sharingan, Kakashi says that there is no doubt about it. However, Obito reiterates his point that it doesn't matter what they call him and all that matters to him is his Eye of the Moon Plan. Kakashi flashbacks to the time when Obito died, and asks if he really survived. Naruto asks Kakashi who Obito was, and Guy answers for him. Obito states that it doesn't matter how he survived and that Rin's death is what changed him. Kakashi, shocked by this, is unable to move. However, Obito continues that blaming Kakashi for letting Rin die is pointless as this world is going to "disappear" soon enough. Naruto tells Kakashi that it doesn't matter what happened in the past but right now Obito's plan needs to be stopped. Obito uses a fire technique, meant for Kakashi, with the full desire to kill him. Naruto blocks it with Kurama's tails. However, before the battle could end, Madara arrives on the battlefield.