Started getting the creation process working for data types, created custom mock data type trees and menu's to get it all up and running but is still in progress. Will finish that on Monday along with dynamically changing the pre-value editors based on the drop down changing.

src/Umbraco.Web/Trees/ContentTreeController.cs

@@ -9,15 +9,18 @@ using Umbraco.Core;
 using Umbraco.Core.Models;
 using Umbraco.Core.Models.EntityBase;
 using Umbraco.Core.Services;
+using Umbraco.Web.Mvc;
 using Umbraco.Web.Trees.Menu;
 using umbraco;
 using umbraco.BusinessLogic.Actions;
 using umbraco.businesslogic;
 using umbraco.interfaces;
+using Constants = Umbraco.Core.Constants;
 
 namespace Umbraco.Web.Trees
 {
     [Tree(Constants.Applications.Content, Constants.Trees.Content, "Content")]
+    [PluginController("UmbracoTrees")]
     public class ContentTreeController : ContentTreeControllerBase
     {
         protected override TreeNode CreateRootNode(FormDataCollection queryStrings)