The Magnetic Rose story has not had its cast revealed yet.
The Blu-ray release from Discotek is undated at the moment but will be done in 1080p and will be getting a new translation done for the subtitles. The release will come with a few extras, including a ‘Making of Memories’ Featurette, the pilot films for Magnetic Rose, Stink Bomb, and Cannon Fodder and Interviews with Katsuhiro Otomo, Koji Morimoto and Tensai Okamura that we’ve seen before. It also looks like we’ll be getting an animated storyboard sequence for the Cannon Fodder piece along with translation and liner notes.