I would have thought that the LoadingRoute would display its template in the {{outlet}} of the main AppView, but it doesn\'t seem like it does. Wha
My guess is that this behavior is intentional, so the LoadingRoute could work while the ApplicationRoute itself is loading. Rendering the application template manually should allow you to render into one of its outlets.
App.LoadingRoute = Ember.Route.extend({
renderTemplate: function() {
this.render("application");
this.render("loading", { outlet: "loading", into: "application" });
}
});