This is very unlikely to happen for a variety of reasons. Mostly because in order for UW to send updates to Subnautica on consoles, they have to go through certification with Microsoft. Including experimental versions on the console would also requi…
Killenjoke makes a good point. As much as everyone on the forums exclaims that they would love to see multiplayer in the game, it's not going to happen (at least until Subnautica is almost completed.) Dev's already stated this.
I'm not going to vote on this because it's not going to happen. The Dev's already stated that Multiplayer could be a possibility in the future. As of right now, they're more focused on completing the game.