The Online_Robin_Trailer.wmv file you have requested: Media / Videos and Trailers / Official Videos / Batman: Arkham City - Robin DLC Trailer - 39.25mb is not available. Perhaps try browsing all files for the game Batman: Arkham City and upload any files you want to share or are missing. This is the only information we could locate:
In the Robin Bundle Pack, Robin will come complete with his own unique gadgets and special moves, and will be playable in all challenge maps in the game, as well as two additional challenge maps that are included with the pack. The pack will also contain two alternative Robin character skins.