Earlier quoted context omitted.
... Did you finish Episode 2? Have you lost internet access for the last 6 years? Valve confirmed it waaaaay back in '07, and Gaben has been dropping little nuggets about it every few years. You really need to understand how painful this is for HL fans. It would be like if AMC decided not to produce & air the final season of Breaking Bad... or delay the final season for 6+ years.
I know that episode 2 did not end the story. However, http://half-life.wikia.com/wiki/Future_of_the_Half-Life_seri... indicates that it did not contain any teasers. I don't remember the details of the ending since it has been a few years since I played it. But in any case, leaving the story with a loose end is not the same as announcing or hyping a game. I don't see anywhere Gabe has even indicated they are working o…
This is a big problem with this long dev cycles. There are a few games where I was a big fan of the previous games but when the sequels eventually came, I had lost interest because I couldn't remember the precious game's story and did not want to replay it. Of course nowadays I'd just get the rundown online or watch the ending on youtube, but unless you're a big fan, it IMHO still dampens the excitement somewhat. At least for me.