People are joking this is Kojima's next stunt and game.
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Director's initials are HK. While not impossible, it is an interesting coincidence.https://www.resetera.com/threads/ps5-exclusive-survival-horror-game-%E2%80%9Cabandoned%E2%80%9D-releasing-later-this-year-tech-demo-out-soon.406389/page-7#post-62384514
Random trailer drop that Sony does seem to give some importance to ("PS5 Exclusive"), similar to MGSV
Mentions of a Playable Teaser (PT) in the description
Extremely weird website with generic text and placeholder items
"BLUE doesn't refer to the color, rather it refers to Best Level User Experience", Kojima is known for his gameplay)
Studio that hasn't found success funding any game... suddenly has a PS5 release in the works with motion capture and all the fancy stuff?
Kojima Productions was going to reveal their next project soon
Mobile game with a Death Stranding like handprint in black ink
Studio logo very similar to the PlayStation Studios one (alright this one might be a reach)
Abandoned is a synonim of Stranded.