They have all the trailers up on youtube, in 4k.
The trailer for Demon's Souls has some good information on the game - https://youtu.be/2TMs2E6cms4
From JAPAN Studio and Bluepoint Games comes a remake of the PlayStation classic, Demon's Souls. This remake invites players to experience the original brutal challenge, completely rebuilt from the ground up and masterfully enhanced with a new “Fractured Mode." In addition to beautiful shadow effects and ray tracing, players can choose between two graphics modes while playing: one focused on fidelity, and one focused on frame rate. Coming to PlayStation 5.