According to joystiq.com, former Disney chief Michael Eisner's production house, The Tornate Company, have purchased the film rights for MechWarrior. Years ago Dean Devlin (producer of Godzilla) was developing the project, but nothing ever came from it. Joystiq.com also reports that Michael Gordon (writer of G.I. Joe: Rise of Cobra ) has been hired to write the script. Earlier this summer it was announced that the MechWarrior videogame franchise would be getting a reboot through Smith and Tinker and Piranha studios.
According to IGN, there could be an issue between Piranha and Harmony Gold - the co-owners of the Robotech games, over trademark issues. IGN reports that Harmony Gold sent cease-and-desist letters, requesting them to stop hosting the trailer for the latest MechWarrior game, claiming the 'bots were somewhat similar to those in Robotech. With disputes already happening on such a small level, the feeling is that it could slow a movie adaptation.
http://www.411mania.com/movies/news/117737/%5BMovies%5D-MechWarrior-May-Come-To-The-Big-Screen.htmMuch more on the potential legal pitfalls here...
http://robojapan.blogspot.com/2009/09/is-there-battletechokay-mechwarrior.html