I've been looking at the information from Red Coin Games to see if this is the real deal. It certainly seems legitimate, with the official Twitter account confirming the game's existence earlier today. They haven't tweeted out a link to the trailer or the platform info just yet, but the YouTube info details where the game will release.
Also worth noting, Chris Sawyer is now working on the project. He's the original creator of the RollerCoaster Tycoon franchise. Thanks to SnowyDay for the heads up!