Video Shows Potential Batman: Arkham City Sequel Idea

As you may recall, Rocksteady Studios hid a teaser for the Arkham City within Arkham Asylum. The YouTube video below suggests this developer has a fairly good idea where Arkham City's sequel will go. Of course, this video is filled with SPOILERS, so watch it at your own risk. Also, you should consider our comments section spoiler filled. Let's discuss

(Thanks to Robert Koch for the tip!)