Also they are not made by the same developer, so ... everything goes.

Those studios are all owned by Sony/Playstation Studios.

Looks like Horizon Zero Dawn did not sell enough copies on GOG to convince them to bring more games here.

I would not jump to conclusions too quickly. Not even all games from the first Sony batch were all brought to GOG, just this single one.
Sony doesn't seem to use a tight grip, just like Disney.
We'll see. I wouldn't rule it out yet.

And that could have been their tester. If it did well, more would come. It did well by GOG standards, but that may have ben a laughable amount of sales for Sony.

For some reason charlemagne1980 bumped this thread about a year after its creation, so I wouldn't be surprised if it gets closed.

I wouldn't say we've gotten any AAAs recently, but we did get confirmation of some interesting highly-desired old games coming soon. :) https://www.gog.com/forum/general/coming_soon_4_classic_titles_from_sneg_b6d7a

"could have been", I agree. But "was"? Not so sure.

edit: I think if they wanted a test run, they would have started with the older ones. After all publishers justify DRM usually with the potential loss of sales due to pirated copies. And you wouldn't risk a new title everyone is waiting for if you have older ones in store.

Btw, Spider-man on Epic can be played without the launcher, but for that you have to start a new game, like you have to do for Death Stranding. Like on consoles the user ID provided by the launcher is used to encrypt the save games. Now that I think of it I have to test if that works for Detroit, Heavy Rain and Beyond Two Souls.

Word on the street was, that Sony would plan their own platform, like EA/Uplay/Rockstar.
In that case we are screwed either way, but I would still prefer that to Steam.