Yeah, it seems definitely because of War of the Gods.
Just from Wiki:
George Pérez's disputes with DC
Around the time of War of the Gods, George Pérez was having editorial problems that caused troubles and problems writing the storyline even from its inception. He felt that DC Comics was not doing enough to celebrate Wonder Woman's anniversary that in turn would promote the story. Also, DC did not plan the story for newsstand distribution, but for direct sales stores only. Originally, the final issue was going to have Steve Trevor and Etta Candy marry, an event he had been building up to since the series was relaunched. DC stopped it so the next writer following Pérez, William Messner-Loebs, would do it instead. Because of this, Pérez would separate himself from DC for several years.
War of the Gods Crossover titles
In addition to Perez's troubles with the promotion of the crossover, there were editorial problems as well, involving the upcoming Armageddon 2001 crossover which caused last minute changes to which titles and characters would be involved and to what degree. An extra issue of Captain Atom and Hawk and Dove's final issue were added after promotional materials were produced and shipped out to retailers, Justice League Europe #31 was not bannered as part of the crossover and numerous parts shipped late and out of order.