Oh right, about that. I don't really know how far the work went, but I can imagine, knowing how similar projects done by similar people ended up.
This is not a diss or anything, hear me out.
In my opinion, Klei has just made your situation better. They introduced sailing mechanic from Shipwrecked but that's it. Boats are different, sea bases are different (way better than in SW lol)... They are also adding Warly for some reason? But that's it, I don't think they are bringing SW content to DST. They just introduced sailing to make reaching lunar island interesting. Also, bridges.
What me and a lot of people wanted from Island Adventure was porting Shiprecked to DST, not creating some new content. With sailing introduced, your job should be way easier now. Just work on porting SW please, as a single separate world and Volcano as a shard or something. After you do this, feel free to do whatever. I just want to play SW with friends, please.