Truthfully, I don't know how to feel about this chapter. The fact that Tobi is Obito just feels out of character. Kakashi Gaiden showed us what a good-hearted person Obito was, and yet here he is trying to take over the shinobi world. He clearly wasn't evil back in the day, seeing as he went as far as to save Rin and give Kakashi his Sharingan. Nor did he have the skill at the point to go toe to toe with Minato. But although I am confused and a little sad that he his Obito, I feel there is room for this to be a good plot twist. Perhaps Madara somehow saved Obito and influenced him much in the way Tobi did Sasuke. If done the right way, I think this could work.
If anything, I found myself rereading Kakashi Gaiden and then this chapter. I really do love the story of a fallen hero. And I can only imagine the emotions Kakashi feels.