SyFy Portal blogger Michael Hinman who seems to be pretty accurate about Battlestar things had this to say about the Battlestar Direct-to-TV movie that is likely to come along between seasons three and four:
Apparently, such a project is still under way despite it not being mentioned in SciFi Channel's news release Tuesday, and the people at GeekMonthly.com say it might be a little prequel-like.
According to reports, the story will focus on the original Cylon sneak attack of the Twelve Colonies that received bits and pieces of coverage in the 2003 miniseries. It also could feature how the Battlestar Pegasus escaped, creating an opportunity for the return of Michelle Forbes -- who played Adm. Cain in the second season -- to the franchise in the one-time event.
Such a infill-type story could create the return of many characters that have since parted ways from the show, and would fit original reports that such a movie would not interfere in the current timeline being established by the show as it moves through its current third season.
http://forums.scifi.com/index.php?showtopic=2264423
Those familiar with Babylon Five might remember one or two of their subsequent movies were also prequels.
Cowperson