I do have a feeling that they will go after someone in Poland(Bloober Team or Astronaut) or Japan(White Owl or Valhalla), many XGS staffs were in Poland and Japan few weeks ago. In a past interview they said that they are satisfied with their lineup in NA and UK, so it seems that they are now moving into mainland Europe or Asia. There were some job postings for Xbox Game Studios Asian division in Japan.
Or they may still continue in NA(maybe studios like Ready at Dawn).