Order of the Dark Side sounds ok. Cheesy and pulpy. Shroud of the Dark Side could be nice as well.
I'm personally a fan of going with a Force Theme for the movies titles, like:
Episode VII: The Force Awakens
Episode VIII: The Way of the Force
Episode IX: The Will of the Force
Those last two would be really confusing in abbreviations, though. I like the Force theme in the titles because I feel like this trilogy is going to be just as much about the nature of the Force as it will be Rey's journey in accepting the Force, and her purpose in the new galaxy.
I can't remember what I first thought of The Force Awakens as a title, but I didn't hate it, that's for sure. I thought it was a compelling, intriguing title, because so much time between Return of the Jedi and TFA had passed, that the concept of the Force awakening in some form was really mysterious. I'm pleased with how the film, and the title of the film played out.
I actually like the PT titles excepting Attack of the Clones. That one just didn't fit the movie like The Phantom Menace and Revenge of the Sith did. The title: Star Wars: Episode 2: Attack of the Clones is a bit better, but as a stand alone title, it is weak. Star Wars: A New Hope is a strong title. A New Hope, is kind of weird on its own. Couple the title, "A New Hope," with an evocative poster, however, and I think it could put people in seats. It's also a mysterious, evocative title, but with no context, the movie could be about anything.