Retro Studios and Silicon Knights were tight back in the Gamecube days. Maybe Retro is collaborating (aside from making their own project) to make Shadow of Eternals?
So it seems all of this just popped out of nowhere, but the site for the developer was registered in July last year. No information anywhere is available other than the fact that it is the creators of Eternal Darkness, or at least one of them.
What trips me out is the name.
Retro = Something of or revived from the past
Precursor = Something that goes before, a forerunner
They aren't exact synonyms, but they can be used to describe similar things. With all of the wordplay going on in game development these days its hard not to be looking for it.
Its very curious because the developer was unknown until today or yesterday, and now they are setting the internet on fire.