From *********** Translation,
1. About the transplantation, Madara says "These are just spares that I implanted". Looks like Madara did it himself
2. He says "I don't have a right eye yet". So, it's not like he had 2 transplanted eyes and gave up one for some reason. He implanted only one eye
3. Madara says "I must have both eyes to unleash my true power". This means, the user needs 2 sharingans to improve the dojutsu. So, Kakashi cannot awaken the mangekyou by himself. I think Madara gives his right eye to Obito after which he manages to awaken his mangekyou, and Kakashi somehow becomes aware of it
4. Obito says "That means, I can become stronger than Kakashi". So, he intends to take his sharingan back when he goes back to the village
I think Obito would bear all the brainwashing Madara does while recovering in the lair, and he goes back to the village to meet Kakashi and Rin, only to find that Rin was dead, Kakashi couldn't protect her despite the sharingan, and Kakashi becoming quite popular as the "Copy Ninja who copied 1000 techniques". Obito then rehashes Madara's words and becomes Tobi
But again, I am finding it difficult to believe that Obito could actually become strong enough to control the kyuubi. From this chapter, Madara wasn't any version of Tobi, and he wasn't active enough to train Obito. Kishi cannot pull off saying "Obito became strong and later attacked Konoha for the kyuubi", it would be ridiculous..