Gundam Build Fighters Try aired from October 2014 to April 2015, and the Gundam Build Fighters Try Island Wars television special aired in August 2016.
The first Gundam Build Fighters television anime series aired from October 2013 to March 2014.
Gundam Build Fighters producer Masakazu Ogawa previously teased in a post tagged with Gundam Build Fighters that “one more special chapter” is in the works and that he expects to make an announcement in early May.
The official website for Gundam Build Fighters posted a teaser image that appears to be the date and time “May 7, 2017 6:00 p.m.”