According to the 39th issue of Shueisha's Weekly Shounen Jump magazine, sports manga Haikyuu!!
will receive a new episode set after the first anime season
at Jump Special Anime Festa 2015. Works serialized in Shounen Jump magazines will be exhibited at the event, to be held November 3–15 in nine cities throughout Japan.
previously received an event anime
at last year's Jump Festa. Production I.G adapted the manga into a 25-episode TV anime which aired from April to September 2014. A second season
is scheduled to premiere this Fall. A recap movie
opened in theaters in July, with a second
scheduled for September.
Source: Scan via ANN