i dont think ( BUT I RLY HOPE ) that Frontier will develop a single vegetation preset for a single island (redwood trees). It would be great yes, but it is not cost efficent at all. i would estimate that they will use the existing presets and maybe just adjust them a little bit. But i rly hope that i am wrong and frontier is one of those developers that are more interested in content quality and variety of ingame content than on cost and time efficient content creation.
So, i am hoping for : REDWOOD TREES, coniferous forest and fog
But i am expecting: same island present like on the other islands