I really hope it's going to be closer to the original than Below Zero.
I liked Below Zero but it wasn't able to instill the same feeling of dread and anxiety that Subnautica could. Below Zero felt a lot more "child-friendly".
And for the love of god: Get that Sea Truck out of my sights. I want my Cyclops back!
Below Zero had far less open ocean, and far less just inky blackness. Plus I think if you played the original, you have an idea of what to expect. Nothing compares to dread of seeing a Leviathan come up from total darkness in the first one.
I didn't see it until its tentacles had already engulfed my little submersible. I screamed like a little girl and didn't touch the game again for weeks. No other game has ever managed to scare me like this.