Over the past week or so WB Games and Rocksteady have released a series of three new gameplay videos for Batman: Arkham Knight which culminated in the final video being released to the public today as part of the PlayStation Experience event that Sony is putting off. But not only do we see the finale of the ACE Chemicals infiltration video, a bonus video also shown provides a tease at the Scarecrow Nightmare missions that will be exclusive to the PS4, enjoy.