Even if the creator of the Bitcoin Satoshi Nakamoto does return, I dont think its going to affect the rate of the cryptocurrency. While the market is expected to grow and stabilize within the next couple of months, its probably not a lot to do with the developer. Moreover, I think this news is fake because why would the maker or makers return after such a long time?
I am not sure about this is true or fake but another news which I read someone pretends that he is satoshi nakamto but he proved that he is lying and as you said the returning on satoshi is not going to change anything but may built trust on people again which can increase the more people to enters into the market.
It turned out to be fake. The website originally referred to is now offline, and yes Craig Wright was proven to be an elaborate hoaxer. More recently, the @satoshi on twitter was also discredited, and his P2P Foundation profile is still hacked. Now you're up to date!