It would be the first canon appearance of the fusion.
As the days creep closer to the release of Dragon Ball Super: Broly, more information comes to the light. The film will bring Broly, the legendary Super Saiyan, into Dragon Ball canon. The massive villain has been surviving on the outskirts of Dragon Ball continuity for over twenty years. He first debuted in Dragon Ball Z: Broly – The Legendary Super Saiyan in 1993, and has popped up in spin-offs and video games ever since. Now that Broly is being made canon, it looks like Toei Animation and Akira Toriyama plan to bring another powerful character into the fold.
Data miners dug into Dragon Ball Xenoverse 2, a popular video game, to investigate an upcoming DLC. The DLC will be centered around the release of Dragon Ball Super: Broly, adding characters from the film into the rosters. The data miners uncovered some surprising information. Tucked away into the playable characters that will be available for the DLC were two forms of Gogeta. One of those forms happens to be his Super Saiyan Blue appearance, which has never been seen in Dragon Ball canon. Dragon Ball Super: Broly is set to hit theaters in Japan on December 14. The highly anticipated film will launch in the US in January 2019.