Sasuke has to be his legacy

[SasukeSaviourofUchiha]

Obito basically has gotten awakened from sleep and had both sharingans to help this battle to seal Kaguya. The main thing he did to help this fight was help bring back Sasuke. After that Obito died...so Sasuke must make a good cause in the ninja world just saying...

 

[TRE MERCER]

Sasuke hasn't done nothing after saving them from I.T. Obito died because he kept saving fodder.

 

[Pumpkin Ninja]

He will, if one of the two die it's game over. Also, he was playing as a decoy, so Naruto could attack.