Assassin's Creed creative director Jean Guesdon has indicated that Assassin's Creed IV: Black Flag will launch simultaneously on all platforms later this year.
Guesdon made his comments during an interview with Outside Xbox (via Videogamer). Shortly after asking about the struggles developing for current- and next-gen platforms simultaneously, the interviewer asked if a delay would occur between "all the versions." To this, Guesdon replied, "Same ship."
Assassin's Creed IV: Black Flag is currently slated for North American release on October 29 and EU release on November 1. Presumably, then, PlayStation 4 (and the next-generation Xbox) will have launched by that time, in both North America and European territories.
The wording of Guesdon's reply isn't entirely concrete, so it's best to take this news with a small grain of salt. Still, Guesdon's comments echo those of PSU's industry sources, who indicated exclusively to PSU that PS4 will, in fact, launch in November 2013.