I wasn't that excited about DC Universe Online
but this video on Game Trailers really blew me away. It's just awesome and you have the iconic voices of Mark Hamill and Kevin Conroy voicing the Joker and Batman respectively adding to the great action that's presented here. The clip's only six or so minutes long, but I'd love to see more. It really does get you pumped up for the game and I only wish the action could be half as great as what you see in the video.