The Dark Empire endnotes were miniature essays by Tom Veitch exploring the backstory of Dark Empire, and later included concept art by Cam Kennedy. They appeared in the back of each issue when they were first published, and were compiled at the back of the first two printings of the trade paperback with some changes made. From the third printing on, the endnotes were dropped, thus making them extremely rare. Much of the information in the endnotes was incorporated into the Dark Empire Sourcebook.