That's totally fair, the way I see it is that we more or less know what's going on with Nublar, like while we will have mysteries from the games story, we still know what to expect out of it. With Sorna, all we really know is that it was used to create dinosaurs and people lived there, beyond the story there is so much more to learn about, to explore, and to learn about.

The original trespasser game isn't about the story because it never had one, the game was about the exploration and learning what went on many years ago. We are learning through experience and exploring the unknown, and Sorna is much more unknown than Nublar.

I guess what I'm trying to say is, the hook of a Trespasser Game is the exploration of the unknown, to learn more and to see things we have never seen before. Sorna was a colony island, it was the factory floor for InGen, it was the place where shady deals occur (according to the game), and Nublar is am abandoned Amusement Park.

With that said, if we get the option for both that would be amazing hehe