Orange12345 said:
They are already making that it's called Pacific Rim (except the anime transition)
You mean the "tribute" to Robot Jox [http://en.wikipedia.org/wiki/Robot_Jox]? Besides, they already made a live-action Gundam movie. It's called G-Saviour.
It may just be nostalgia talking, but I think the original Mobile Suit Gundam would probably be a good candidate for a live-action remake. There seemed to be less fantastical elements (and sparkles) in the original, the pacing was better (Amuro Ray doesn't start out as the typical ace pilot that cuts through mutliple enemy units with ease), and it stayed more true to the real robot genre than the more recent iterations of Gundam. Another good candidate would be Mobile Suit Gundam: The 08th MS Team, which in turn deals with guerrilla warfare in the jungles of southeast asia (imagine the war in Vietnam with giant robots).