WotC used to have catalogs that would tell you what was due out at least three months in advance, if not further. Do they still do articles of what's coming down the road or have they clammed up like Games Workshop (where you learn 3 days before they release new content, it seems)?
I don't understand this. Right on WOTC's web site there's always been a link to their product catalog. Right now it has products up until the beginning of December listed (and has since around May, I think. Meaning that they generally announce 3-6 months prior to release.) Admittedly, this year has been rather scarce on the new D&D front but they have always had an easily accessible catalog, well in advance of actual release.
I was responding to another person's statement who had stated they were only seeing new items via checking Amazon. I hadn't been to WotC's web site in some time, so I didn't know if they still had their future products listed. As you noted that they apparently still do, they used to give us a long lead-time notice on upcoming content, and even had web articles (do they still?) discussing what was coming in the next couple of months. I know since 5E their RPG offering have been slim (as has always been the case with a new edition announcement), but TSR/WotC has always been way more open than, say, Games Workshop.