Reveal Trailer
It's called Pyre.

Can't see much of the gameplay, but it sure looks pretty. No mention of a GOG version, though both PS4 and Steam are shown as release platforms. Also, 2017 is a long time away.

That looks bad ass actually...

Already got a thread:
https://gog.com/forum/general/pyre_new_game_from_supergiant_games_2017

-_-

I literally searched for "Pyre" before making this post. Stupid GOG search.

Had the same issue when I first saw the news as well, but then I remembered that searching in any other search engine "GOG"+*whateverYouAreLookingFor* is actually better than GOGs own search engine...
...and this was when I found the other thread. :D