Tommy Yune talked a little bit about the live-action move at the Robotech panel at Anime Expo.
Yune confirmed that that Warner Bros. is planning the film, that Tobey Maguire is involved, and the script is being written by Lawrence Kasdan. Also, Yune said the live action film is planned to be a re-imagining of the Robotech universe, and that the film will take place in the future.
In addition, Yune commented that Robotech: Shadow Rising (the sequel to Robotech: The Shadow Chronicles) is going to be taken in a new direction because of new opportunities brought about by the live-action film.