The one problem w Metroid Prime is that the art style was very very well balanced with the limitations of the systems it ran on. A simple up-res could look both visually bare and inappropriately sharp - the Twilight Princess remaster had that problem to a lesser extent. Cel shaded graphics lent themselves much more to an HD upgrade. Ideally it would be a "remaster" with the license to recreate the "feel" of the original.