it isnt anything particuraly new but make it when u go to make a new world in sn2 u can select to add creatures from sn1 to sn2 like ghost leviathans reapers or sea dragons they would patrol in there own areas or the areas where other leviathans already inhabit like collector leviathan territory

Dude, i can see where you are coming from but at that point just mod the game yourself.

If I want SN1 creatures I’ll play SN1. It’s a different planet, it shouldn’t have the same animals.