Cruise is my pick, and makes the most sense the more I think about. The guy is a great actor in addition to having charm, charisma, gravitas , and is a household bankable name. The former Top Gun as Hal Jordan is an inspired idea . You get Cruise in there, already you've intrigued the GA and get people interested in a less well known property. Surround him with younger talent and have him bring on some solid writers and you could really have a great film.