Half-Life: Alyx VR Game Plans Leaked?

DSOGaming and Wccftech report a rumor that a new VR game called Half-Life: Alyx will be announced at the Video Game Awards 2019, saying this is aiming for a March 2020 release. This seems to have its origins in a leaked interview with Robin Walker and another Valve employee conducted by awards host Geoff Keighley. This was posted to Google Docs, but has since been removed with a complaint that PC Gamer's "clickbait" coverage may put the announcement in jeopardy, which seems an odd concern to attach to a deliberate leak. So this is unconfirmed for now, and we will learn more about the accuracy of this information when the awards show airs on December 12th. In the meantime, here's the part of the purported leak that mentions the game, and how it is not actually intended to be Half-Life 3:
(Geoff:) Speaking of "Half-Life: Alyx", (It will be at) The Game Awards, December 12th. We will have more to share with you on the game there so I hope you get to tune in. I'm excited to show more of it there.

But I think people probably wonder, okay, moving forward does this mean that Valve now is just making VR games? Are we going to get that Half-Life 3, or that new big, epic kind of Valve game down the road? Or is it, oh now we're makin' VR games, that's what we do?

I mean, we're very excited about this, but you know, until we ship, you never know. Maybe we're all really wrong, and it's terrible. We have to wait and see what the reception is like.