Yes, I was reading that Amazon Prime is the owner now. I have to wonder what has happened to all those wonderful sets constructed in Toronto for the ScFy production. Hopefully everything stays with the production, including the writers. I would hate to see it turn into a low budget green screen knock off of the original (Yes I know the space exteriors are all green screen, but you get the idea, it's the interiors, etc).
Also do we now have to subscribe to Amazon Prime, which is not as cheap as Netflix, to be able to see it.
Cas Anvar (Akex) talks about what is coming in season 4, here:
https://screenrant.com/expanse-season-4-amazon-details/