It's neat because the New Warriors had quite a few mutants already, Justice, Firestar and Namorita, from the original lineup, and then Silhouette and a few others (Timeslip, Bolt, Microbe, as well as *nine* former mutants after M-Day, including Jubilee!) later. They could totally justify half the New Warriors living on Krakoa, and the other half hanging out regularly, and not just for team sports.