This is nothing but worthless clickbait. No proof that it is Satoshi is provided, and an absurd claim that he is working on Ethereum is included, which likely points to a motive to pump Ether. The article claims that it is "signed" by Satoshi:
The author basically could have told his friend to send him an e-mail claiming to be Satoshi and published an article about it and then shilling Ether. This is really a bizarre article.
Don't trust Cointelgraph with such shameless clickbait. This would be "funny" if it were a troll, but this is supposed to be a news site? Don't click that ridiculous link because that's what they want.
If you absolutely must read the fake e-mail then here: