Well, today's update basically is what we got at E3 but a tad bit more. First off, he tells us the release date, which we already know:
He then posted a video, but don't get too excited. It's the same thing that we saw at E3, but just with like 2 more scenes. Nothing that spectacular. You can see the video here.
The second bit of the update was a profile for Donkey Kong, who was revealed in the 15 second trailer.
He's back and we now have some pictures of him in action: