Override Marionette route to have ability to pass different controllers to the single router

gistfile1.js

Marionette.AppRouter.prototype.processAppRoutes = function(controller, appRoutes) {
  var routeNames = _.keys(appRoutes).reverse(); // Backbone requires reverted order of routes

  _.each(routeNames, function(route) {
    var methodName = appRoutes[route];
    var params = methodName.split('#');
    var ctrl = controller;
    var method;

    if (params.length > 1) {
      var ctrlName = params[0];
      ctrl = this[ctrlName] || this.options[ctrlName];
      methodName = params[1];
      if (!ctrl || !methodName) {
        throw new Error('Please specify correct route');
      }
    }
    method = ctrl[methodName];

    if (!method) {
      throw new Error('Method "' + methodName + '" was not found in the controller');
    }

    this.route(route, function () {
      this.trigger('before:route:change');
      method.apply(ctrl, arguments);
    });

  }, this);
};

gistfile2.txt

appRoutes: {
  'search': 'search#search'
  '*any'  : 'common#notFound'
},

initialize: function () {
  this.common = new Common();
  this.search = new Search();
}