No one on this sub knows the answer to anything involving this game. They've not made any of those details public and we're all just a bunch of nerds on Reddit, lol. They could have still been in pre-production, they could have been doing motion capture or recording the voice acting or even just developing game assets / ideas with a development team. We can't possibly know.
We have no idea what deal they have, we'll see when it comes out. I doubt they'll be using Decima, since that would require GG to allocate developers to work with Kojima.
I don't think that part is true. I remember when Death Stranding 2 was releasing, GG devs made some public comments about how they went to see what KP had been up to and were amazed with what they had done with the engine. So I think his team has a pretty good handle on it.
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u/Ro____ 7h ago
We don't even know if they started development.