Going Beyond EMS
Uchiha Madara: What are his goals? Let's look at what he's done, since his actions would support his goals.
1) He hid from the world after suffering defeat from the First
2) He assembled and created Akatsuki in order to gain the tailled beasts.
3) He assisted in the murder of his own clan
4) He gleefully anticipated and approved of the Itachi vs Sasuke fight and He ordered Pain to capture Naruto
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5) He exclaimed that after the Bijuu are captured, their (read his) goals will be met and everything will be as it should, his rightful power (implied).
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6) Speedily rushed to Sasuke after the Itachi fight.
7) He forced Sasuke to sit and listen to his soliloquy.
8) Goaded Sasuke emotionally until Sasuke's MS manifested (skillfully done).
9) He manipulated Sasuke to wanting to destroy Konoha.
If all the things Madara did above were not just for sheer entertainment, they must then have a bearing with his plans. Which are:-
1) Destroy Konoha
***Madara didn't really need Sasuke before he could attack and destroy Konoha (he has Pain after all), also he is not likely to leave a strong potential adversary like Sasuke running around to get stronger and oppose him in the future:
2) Use the Bijuu and use Sasuke for his final goal.
His final Goal is not going to be something like world peace and democracy, nor sharing power with Pain, Akatsuki, and Sasuke. I'd say that Madara is Obsessed with the Sharingan. His entire history is all about gaining more and more power with the Sharingan, and his desire to rule, lead, control for ever.
I have to stick out my neck and agree with those who think that Madara is after Sasuke's Eyes.
3) His final goal is:- Use Sasuke's Sharingan to gain a brand new higher powered-up Sharingan for himself. EMS was great, but Madara suffered defeat from Shodaime even with the EMS. Now he wants something even better than EMS, and he needs Sasuke's eyes and Chakra from the Bijuus to do it.
For now he's content to wait and watch Sasuke go against Konoha, while the Bijuus are still being gathered. Also I don;t think Sasuke has EMS yet. He needs Itachi's eyes for that, that is probably why Madara took and kept Itachi's body.