This has been discussed many a time. Why is Madara trying to keep Sasuke instead of killing him, if he knows Sasuke may want to kill him?
The answer, with proof: he wants to get Sasuke's eyes once they are strong enough according to Madara's standars.
Why do I say so? Because the manga states that in order to obtain EMS (Eternal M. Sharingan) exchanging eyes can be done between clansmen, not only between brothers.
Check the middle of the page:
If anyone has another part of the manga contradicting this, please post!
The answer, with proof: he wants to get Sasuke's eyes once they are strong enough according to Madara's standars.
Why do I say so? Because the manga states that in order to obtain EMS (Eternal M. Sharingan) exchanging eyes can be done between clansmen, not only between brothers.
Check the middle of the page:
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If anyone has another part of the manga contradicting this, please post!