Madara's reaction in seeing Sasuke

[Nous]

This is how I see it happening - Madara looks at Sasuke shocked. "Izuna is that you?" Madara says and Sasuke does his infamous "..." or says something like, "No, I am Sasuke Uchiha!" Madara thinks "Obito didn't eliminate the whole clan I see." Subsequent to such, Sasuke activates his Eien no Mangekyo Sharingan and Madara looks surprised but a frightened surprise. "Those eyes.." Madara awakens his Rin'ngan and begins to launch an offensive on Sasuke which Sasuke will either block or Hashirama will come to save the day. My apologies - I am not the greatest with FanFics/Predictions.

 

[AlphaScythian]

Yes sasuke and izuna are very close in appearance.
Madara might view sasuke as his reincarnation and will fall for his TNJ