To SERIOUSLY answer this question.
The movie has been put on hold because Chiaki Morosawa (one of the co-creators and writers of the GS series) has been sick for the past year or so because of a blood disorder (NO CANCER DIPSHITS) she inherited from her mother's side of the family.
As of now the movie is still on awaiting for her improved health to allow her to return to writing it all out.
What has been conformed is the all the main characters will return along with most of the new cast from GSD. Lacus and Kira are engaged to be married (or will be sometime during the movie), Shin and Lunamaria are still a couple, and it's been hinted that Meyrin and Athrun have already gotten married making Meyrin, Mrs. Mayrin Hawke Zala.