Batman Arkham Origins is such a worthy video game prequel. At times, the game feels same, but also, has differences. One instance is the Deathstroke Boss Fight, even the inclusion of Shock Gloves.
Its not Return to Arkham. When this game was released, there were exclusive maps and the ability to play as joker for the ps3 and mac only. There is a way to download the dlc files from the mac version. You then basically put them into the game files allowing you access to it. I did this exact thing so I can make stealth vids using these maps and so I can play as joker. I even have a vid where I did stealth on the Hothouse Prey map (which is one of the dlc maps).