Given that this was the administration's attempt to implement a ban on Muslims entering the country, I'd expect it to be expanded to more predominantly Muslim countries if the courts don't completely smack it down and the administration survives long enough.

And beyond that, who knows? When insane people are in power, anything is possible. Maybe some big attack is carried out by a radicalized Muslim from France or Sweden, and the response is to ban entries from there. I'd have called this idea absurd not too long ago, but now I consider this kind of thing a serious, if small, possibility.