This is what we do know:
1. Bryan Singer hasn't completed a "Battlestar Galactica" production of any sort in 11 years, despite repeatedly announcing this production.
2. These other movies he announced never got made "period", or never got made by him:
b. Logan's Run
c. X-Men: Last Stand
d. Six Billion Dollar Man
e. Star Trek
3. One particular movie he has been working on for ages is a year and a half late in reaching theaters, and if it does reach theaters by its new release date of Spring 2013, it will have been four years in the making.
a. Jack The Giant Killer
4. Immediately after making his latest "Battlestar Galactica" movie announcment on August 21st, 2011 (which he proclaimed he would give his complete, undivided attention to), he announced "The Munsters", "Star Trek", and "Six Billion Dollar Man" as being his very next projects instead of "Battlestar Galactica."
Now, the following are some symptoms of "Attention Deficit Disorder" which could (very easily) be used to describe the circumstances above:
(All of these symptoms are listed in the two links above)
a. Be easily distracted, miss details, forget things, and frequently switch from one activity to another.
b. Have difficulty maintaining focus on one task.
c. Become bored with a task after only a few minutes, unless doing something enjoyable.
d. Have difficulty focusing attention on organizing and completing a task or learning something new or trouble completing or turning in homework assignments, often losing things (e.g., pencils, toys, assignments) needed to complete tasks or activities.
e. extreme distractibility; wandering attention makes it hard to stay on track.
f. difficulty paying attention or focusing, such as when reading or listening to others.
g. struggling to complete tasks, even ones that seem simple.
h. tendency to overlook details, leading to errors or incomplete work.
Now, I'm not saying that Mr. Singer has "Attention Deficit Disorder" because I'm not a doctor. I'm also not saying that he has been diagnosed with "Attention Deficit Disorder" because I don't know.
What I am saying is that his habit of announcing movies and never making or completing them on a regular basis falls within the realm of the symptoms listed above.