So many people I know here int he US want this. One was very excited and asked me about it - I told him in Europe only. Maybe that will change. It's definitely a good home for a lot of the Fox franchises.
I would love to see it come to teh US but I don't see it happening anytime soon. Star is bascially going to places that don't have Hulu. Since Disney has an outlet in the US to dump any mature content to already there is no need for them to bring Star over here. If they did Hulu would be nearly pointless at that point and would likely shut down, but that is a secondary cash flow for them to have both. If they did combine the two I'd expect to see subscription rates for Disney+ increase significantly to make up for it.