From EW.com's Ausiello Files:
It's official: Smallville's upcoming two-hour Justice Society-centric "movie" is now an actual movie. Sources confirm to me exclusively that The CW has jettisoned the separate titles that were initially assigned to each of the two episodes -- "Society" and "Legends," respectively -- in favor of the singularly sensational (and far more marketable) Smallville: Absolute Justice. What's more, I hear the movie will air as a seamless two-hour event with only one set of credits.
By the way, the air date for Smallville: Absolute Justice was recently changed from Jan. 29 to Feb. 5. Adjust your schedules accordingly.