diff --git a/src/Umbraco.Core/Models/EntityBase/Entity.cs b/src/Umbraco.Core/Models/EntityBase/Entity.cs
index 6c081ea0b4..8df5be5809 100644
--- a/src/Umbraco.Core/Models/EntityBase/Entity.cs
+++ b/src/Umbraco.Core/Models/EntityBase/Entity.cs
@@ -66,6 +66,15 @@ namespace Umbraco.Core.Models.EntityBase
         [DataMember]
         public DateTime UpdateDate { get; set; }
 
+        /// <summary>
+        /// Gets or sets the WasCancelled flag, which is used to track
+        /// whether some action against an entity was cancelled through some event.
+        /// This only exists so we have a way to check if an event was cancelled through
+        /// the new api, which also needs to take effect in the legacy api.
+        /// </summary>
+        [IgnoreDataMember]
+        internal bool WasCancelled { get; set; }
+
         /// <summary>
         /// Property changed event
         /// </summary>
diff --git a/src/Umbraco.Core/Services/ContentService.cs b/src/Umbraco.Core/Services/ContentService.cs
index ee435f0ffa..18f7de78b0 100644
--- a/src/Umbraco.Core/Services/ContentService.cs
+++ b/src/Umbraco.Core/Services/ContentService.cs
@@ -64,13 +64,15 @@ namespace Umbraco.Core.Services
 	    /// <returns><see cref="IContent"/></returns>
 	    public IContent CreateContent(string name, int parentId, string contentTypeAlias, int userId = 0)
 		{
-		    IContentType contentType = FindContentTypeByAlias(contentTypeAlias);
-            IContent content = null;
+		    var contentType = FindContentTypeByAlias(contentTypeAlias);
+            var content = new Content(name, parentId, contentType); ;
 
 			if (Creating.IsRaisedEventCancelled(new NewEventArgs<IContent>(content, contentTypeAlias, parentId), this))
-				return content;
+			{
+			    content.WasCancelled = true;
+			    return content;
+			}
 
-	        content = new Content(name, parentId, contentType);
 	        content.CreatorId = userId;
 			content.WriterId = userId;
 
@@ -92,13 +94,15 @@ namespace Umbraco.Core.Services
         /// <returns><see cref="IContent"/></returns>
         public IContent CreateContent(string name, IContent parent, string contentTypeAlias, int userId = 0)
         {
-            IContentType contentType = FindContentTypeByAlias(contentTypeAlias);
-            IContent content = null;
+            var contentType = FindContentTypeByAlias(contentTypeAlias);
+            var content = new Content(name, parent, contentType);
 
             if (Creating.IsRaisedEventCancelled(new NewEventArgs<IContent>(content, contentTypeAlias, parent), this))
+            {
+                content.WasCancelled = true;
                 return content;
+            }
 
-            content = new Content(name, parent, contentType);
             content.CreatorId = userId;
             content.WriterId = userId;
 
diff --git a/src/Umbraco.Core/Services/MediaService.cs b/src/Umbraco.Core/Services/MediaService.cs
index 88aab5d5e1..71b7f421b4 100644
--- a/src/Umbraco.Core/Services/MediaService.cs
+++ b/src/Umbraco.Core/Services/MediaService.cs
@@ -46,11 +46,8 @@ namespace Umbraco.Core.Services
 	    /// <returns><see cref="IMedia"/></returns>
 	    public IMedia CreateMedia(string name, int parentId, string mediaTypeAlias, int userId = 0)
 	    {
-	        Models.Media media = null;
-	        IMediaType mediaType = null;
-            if (Creating.IsRaisedEventCancelled(new NewEventArgs<IMedia>(media, mediaTypeAlias, parentId), this))
-                return media;
-
+            IMediaType mediaType;
+	        
 	        var uow = _uowProvider.GetUnitOfWork();
 	        using (var repository = _repositoryFactory.CreateMediaTypeRepository(uow))
 	        {
@@ -68,7 +65,13 @@ namespace Umbraco.Core.Services
 	                                                  mediaTypeAlias));
 	        }
 
-	        media = new Models.Media(name, parentId, mediaType);
+	        var media = new Models.Media(name, parentId, mediaType);
+
+            if (Creating.IsRaisedEventCancelled(new NewEventArgs<IMedia>(media, mediaTypeAlias, parentId), this))
+            {
+                media.WasCancelled = true;
+                return media;
+            }
 
 			media.CreatorId = userId;
 
@@ -90,11 +93,7 @@ namespace Umbraco.Core.Services
         /// <returns><see cref="IMedia"/></returns>
         public IMedia CreateMedia(string name, IMedia parent, string mediaTypeAlias, int userId = 0)
         {
-            Models.Media media = null;
-            IMediaType mediaType = null;
-
-            if (Creating.IsRaisedEventCancelled(new NewEventArgs<IMedia>(media, mediaTypeAlias, parent), this))
-                return media;
+            IMediaType mediaType;
 
             var uow = _uowProvider.GetUnitOfWork();
             using (var repository = _repositoryFactory.CreateMediaTypeRepository(uow))
@@ -113,7 +112,12 @@ namespace Umbraco.Core.Services
                                                       mediaTypeAlias));
             }
 
-            media = new Models.Media(name, parent, mediaType);
+            var media = new Models.Media(name, parent, mediaType);
+            if (Creating.IsRaisedEventCancelled(new NewEventArgs<IMedia>(media, mediaTypeAlias, parent), this))
+            {
+                media.WasCancelled = true;
+                return media;
+            }
 
             media.CreatorId = userId;
 
diff --git a/src/umbraco.cms/businesslogic/media/Media.cs b/src/umbraco.cms/businesslogic/media/Media.cs
index aed7476d5b..f2c0c84847 100644
--- a/src/umbraco.cms/businesslogic/media/Media.cs
+++ b/src/umbraco.cms/businesslogic/media/Media.cs
@@ -1,6 +1,7 @@
 using System;
 using Umbraco.Core;
 using Umbraco.Core.Models;
+using Umbraco.Core.Models.EntityBase;
 using umbraco.BusinessLogic;
 using umbraco.DataLayer;
 using System.Collections;
@@ -85,8 +86,8 @@ namespace umbraco.cms.businesslogic.media
             }
 
             var media = ApplicationContext.Current.Services.MediaService.CreateMedia(Name, ParentId, dct.Alias, u.Id);
-            //The media object will only be null if the 'Creating' event has been cancelled
-            if (media == null)
+            //The media object will only have the 'WasCancelled' flag set to 'True' if the 'Creating' event has been cancelled
+            if (((Entity)media).WasCancelled)
                 return null;
 
             ApplicationContext.Current.Services.MediaService.Save(media);
diff --git a/src/umbraco.cms/businesslogic/web/Document.cs b/src/umbraco.cms/businesslogic/web/Document.cs
index a470d31fb7..6c9f039976 100644
--- a/src/umbraco.cms/businesslogic/web/Document.cs
+++ b/src/umbraco.cms/businesslogic/web/Document.cs
@@ -7,6 +7,7 @@ using System.Xml;
 using Umbraco.Core;
 using Umbraco.Core.Models;
 using Umbraco.Core.Logging;
+using Umbraco.Core.Models.EntityBase;
 using Umbraco.Core.Persistence.Caching;
 using Umbraco.Core.Services;
 using umbraco.BusinessLogic;
@@ -288,8 +289,8 @@ namespace umbraco.cms.businesslogic.web
 
             //Create a new IContent object based on the passed in DocumentType's alias, set the name and save it
             IContent content = ApplicationContext.Current.Services.ContentService.CreateContent(Name, ParentId, dct.Alias, u.Id);
-            //The content object will only be null if the 'Creating' event has been cancelled, so we return null.
-            if (content == null)
+            //The content object will only have the 'WasCancelled' flag set to 'True' if the 'Creating' event has been cancelled, so we return null.
+            if (((Entity)content).WasCancelled)
                 return null;
 
             //don't raise events here (false), they will get raised with the d.Save() call.