The RT live action movie isn't going to happen, there just isn't enough interest and the whole 80s cartoon fad is pretty much over. People are already bored with it as it is. A RT live action movie wouldn't even do that well today either for that matter. People who have never heard of robotech would claim it is just a Transformers rip off which would only end in moar drama. Anyways, there's been nothing recent about the movie not even announced at comic con. So what does that tell us? There isn't going to be a movie but HG doesn't want the fans to know for obvious reasons.
Then again the fans should be thankful there isn't going to be a movie, it would just be plain horrible. I've said this before and I'll say it again...... not everything translates well to live action, and if cartoons were meant to be live action they wouldn't have been F******! cartoons in the first place.