In the actual supposed transcript portion, Geoff plainly states, "March 2020, 'Half-Life: Alyx' comin' out." Geoff also explained that it would be a VR-only release, and responded to a question asking why that decision was made.
"Yeah, I mean we would love to be delivering a version of this that you could play with a mouse and a keyboard, but as we said, it began as an exploration of VR," Geoff says, according to the document.
"Got it from a close source (I'm gonna call him Jim) who has been working on the project for a while (also been in Valve for some time, but he is not known publicly) and I've known him for a few months. So basically, the announcement is coming Wednesday," the user wrote.
According to that post, it's a VR continuation of Episode 2, "but also a separate thing," whatever that means.
On top of all this, McVicker noticed that a bunch of developers at Valve have recently removed references to The Valley of the Gods in their Twitter profiles. Speculation is that they have abandoned the project, possibly to work on Half-Life: Alyx.
There are certainly a lot of pieces to the puzzle, though whether they actually fit together is not known. Perhaps we will find out on Wednesday if, as the Reddit poster claims, an announcement is coming.