I'm using it to split my router into modules. You can see the gist of it [here](https://gist.github.com/thejameskyle/1f9f7d78ae1cd07ccd1d). I copied some of the [stuff from this PR](https://gist.github.com/thejameskyle/1f9f7d78ae1cd07ccd1d#file-application-router-js-L7-L29) as well as [modify](https://gist.github.com/thejameskyle/1f9f7d78ae1cd07ccd1d#file-application-router-js-L31-L39) `Marionette.AppRouter._addAppRoute` to add every route to `appRoutes`. I also experimented with grabbing the [route handler](https://gist.github.com/thejameskyle/1f9f7d78ae1cd07ccd1d#file-application-router-js-L12-L18).