Marathon looks like an Ai agent would create. Art style, gameplay and story wise.
This is the next game from the Destiny creator Bungie. A multiplayer extraction shooter. It has nothing to do with the original Marathon game its based on, an old single player game. Those who could hands on the game describe it as a Destiny like controls and animation, but as an extraction shooter mode.
As for me, I would probably even check the game out, if it was free to play (its full price game, like Concord) and if it would be playable on Linux. Bungie is anti Linux, so not for me anyway.
Don’t make yourself (and others) false hope, it will not happen. Why? In the past Bungie officially said they don’t want support Linux. This company is quiet hostile towards Linux for whatever reason. That’s why I don’t have any hope for this game to be playable on the Deck (or in Linux general for that matter).
Sure things can change sometimes, but I would not hope on this based on speculation. Not being the party pooper here, just trying to be realistic based on history.