Backbone Marionette module starting from [this fork]( https://github.com/elycruz/generator-marionette ) and [this repo]( https://github.com/mrichard/generator-marionette ) and [for this comment]( https://github.com/mrichard/generator-marionette/issues/37 ) .

app-my-app-mod.js

define([
    'backbone',
    'application',
    'apps/my-app-mod/layout/my-app-mod-layout',
    'apps/my-app-mod/my-app-mod-list',
    'apps/my-app-mod/item/message-view',
    'apps/my-app-mod/my-app-mod'
], function(Backbone, app, MyAppModLayout, MyAppModListController, MessageView, AppRouter) {

    'use strict';
    return app.module('myAppMod', function(mod) {
        mod.addInitializer(function() {

            var myAppModLayout = new MyAppModLayout();

            app.content.show(myAppModLayout);

            var myAppModListController = new MyAppModListController({
                application: app,
                layout: myAppModLayout
            });

            app.router = new AppRouter({
              controller: myAppModListController});

            console.log('MyAppMod has been initialized.');
        });

    });

});