Sorry for such a late reply to your question, I was doing some digging and found this website that Arc Dream appears to be using to give loose timelines for releases. (Going to add this to the stickied post)
Products that are relatively close to publication may be labeled as being in “editing,” “layout,” or “printing.” Physical rewards are also available digitally. We do not generally give release dates for physical rewards unless one is at press and we can predict its publication date with certainty.
Deep State (hardback) in development by Shane Ivey and Christopher Gunning
So it unfortunately does not list a solid date. I take this to mean they are working on it, with all the other products on that page.
There may be a lot of lore coming in the book, but it's also very possible that March Industries is a sort-of foil to the Cowboys/DG. A large corporation with many subsidiaries each working in silos, so that any one arm has no idea what the others are up to. I'm sure you've absorbed all the internet has to offer at this point, but the wiki has a little info on March.

Delta Green Mega Bundle of Holding
If you're looking to get started with Delta Green, round out your PDF collection or just support the creators & their charity, Arc Dream has put an excellent mix of books up on Bundle of Holding.
If you're looking to just play and were waiting for the right moment to pick up the player tools, for $7.95 you can pick up the following in the Agent Bundle to get started:
- Delta Green Agent's Handbook
- The Complex
- Agent Dossiers
However if you want to go deeper and run your own games, then you can upgrade to the Handler Bundle for about $40 and get all of these:
- Delta Green Handler's Guide
- Delta Green: The Conspiracy
- Delta Green: The Labyrinth
- Iconoclasts
- Impossible Landscapes
- ARCHINT
- Delta Green Handler's Screen
All told, about $186 worth of PDFs

Delta Green Asset Packs on Bundle of Holding
Rachel Ivey made several packs of digital assets (logos, graphics, etc.) that someone could quickly bash together in their favorite imaging app to create realistic props for their campaigns. And now they are on Bundle of Holding. Regularly $60 but are going here for only about $20.

Part actual-play, part audio drama - The Redacted Reports
So I just very recently uncovered this podcast (presumably because I've been living under a rock). And I have to say, it's different, but really well done. It's a lot less a bunch of friends sitting around joking and throwing dice, and much more improv-actors telling a story set around several different Delta Green RPGs. They clean up their table-talk and rework some gameplay/conversation to add to the dramatic effect. Once I got used to their format, I find I really like it.

Scenario/Investigator Inspiration?
So where does everyone like to draw inspiration from for their DG games/Investigators or even NPCs?
True Detective, X-Files, great TV shows. The SCP Wiki has some good inspiration. I used to peruse/listen to the occasional interesting looking conspiracy websites/podcasts, when they're just weird and less political.
Where do you all like to draw inspiration from?

Where did you first hear about Delta Green?
For me, way back in the early times of 2015, a friend mentioned how much she loved playing Call of Cthulhu in college. A group of us now adults decided we'd try and get a game or two together, and I somehow became the Keeper. In an effort to get myself up to speed on DM'ing (after a looong dry spell) I started listening to Actual Plays, and at the time, the biggest one was RPPR.
At that point, they were adapting Chaosium rules to Delta Green a bit, but there was also bubbling interest in the re-release of Delta Green by Arc Dream. I was focused on CoC content, but I very quickly got into the DG stuff they were playing. I barely missed the original Kickstarter but have made it into all the rest and have a little bookshelf I'm proud of.
How about everyone else?
Hey, thanks for this post! Took me a minute to realize there was a difference between "The Glass Cannon Network" and "The Glass Cannon Podcast"
There are a few DG & DG adjacent podcasts in their list. I'm always eager for more Actual Play content, so I subscribed to a couple.

God's Teeth a teensy bit closer to release

Lovecraftian cosmic terror meets the War on Terror. The award-winning RPG setting comes thundering back in a new Cthulhu Mythos game.

There is now artwork and a pre-order link up on backerit. Additionally Rachel Ivey posted about it in the Facebook group. Explicitly stating "Please don't ask when it will be released to the public."
That said, Caleb, the author, has been play testing it on his Patreon for months now so between those two signs, if I were divining tea leaves I'd say we're getting close.
And if you don't know about this scenario, do yourself a favor and go poking around for it. The original Actual Play was one of my all-time favorites.
Several years back during RPPR's broadcast of Masks of Nyarlathotep where they used Trail of Cthulhu rules, as a break one of the characters ran a Jane Austen-esque one shot replacing sanity with propriety which was great. Anytime a character broke the standards of decency everyone required a propriety check.
I believe if you back Dennis Detweiller's Patreon, he offered a PDF of that deck. Not entirely sure you can go back and snag it now but I believe becoming a backer means you can see old rewards.
Next chance I'm at a PC and not a phone I'll work on these!
That's the worst! Our little group has one working overseas and the couple (me and my wife) disrupting the schedule as a pair. I miss our regular Sundays.

Introductory Post for the DG Community
Brief Overview
There are multiple sources of information for Delta Green, and most of these are common knowledge if you're already a fan of the game. But I thought I would compile them all into a single post to get things started.
Lastly, if you're looking for a layman's description of what the setting is like, it can best be described as a conspiracy within the US Government willing to use extra-judicial means to keep the world safe from unnatural threats. There are other-national offshoots, there are conspiracies within conspiracies.
I always describe it as, Men in Black if it were a violent, R-Rated crime-drama or X-Files if it were all about the Cigarette Smoking Man.
While not a DG inspired series, as far as I'm aware. True Detective Season 1 starring Matthew McConaughey and Woody Harrelson is an excellent, engaging primer on how the stories hit.
2023/7/4 What's everyone running?
I thought it might be nice to put out a thread on what people are currently running or have run recently. Anything CoC related should be fine.
Best use you've seen of the Cthulhu Mythos Skill?
I asked this post once in another site that shall not be named, and it had a lot of fun answers, so I'll throw it out here.
"What is the best use you've ever seen of the Cthulhu Mythos skill?"
It's such a difficult skill to build up, and using it successfully is a very difficult feat to pull off, what's been your favorite way to see it "work" for a player?