If Bitcoin was centralized, it would make logical sense to have him back as an expert for any technical support and what not.. but fortunately for us Bitcoin was built on a decentralized platform which turns out to be it's strength as it can't be shutdown by any overzealous person or forked by a single Dev without consensus.

Besides, Satoshi identity reveal would be bad for Bitcoin in many ways..for example users would want new projects to be associated with his name and money would easily flow out of BTC to that new endorsed project, privacy for the man/family would be thrown out of the window etcetera... Honestly it's better we continue without him and keep getting entertained by the likes of Craig Wright