Dozens of Dragon Ball GT references have already been found in the Super Baby 2 and Super Saiyan 4 Gogeta trailer for Dragon Ball FighterZ

Many attacks in Dragon Ball FighterZ clearly take references from the manga, anime and movies featuring the Dragon Ball universe. It seems that Super Baby 2 and Super Saiyan 4 Gogeta from Dragon Ball GT also feature attacks and techniques

Dragon Ball Super: Broly (2018) - News - IMDb

Dragon Ball FighterZ gets Super Baby 2 in Jan 2021, Gogeta (SS4) soon

Dragon Ball FighterZ News, Rumors and Information - Bleeding Cool News Page 1

Dragon Ball GT - Wikipedia

Some more Gokus we can look forward to in the future : r/dragonballfighterz

UPDATED 12/21] Super Saiyan 4 Gogeta, Super Baby 2 to complete DBFZ Season 3 FighterZ Pass - Inven Global

Dragon Ball FighterZ Adds Super Baby 2, SS4 Gogeta Soon - GameSpot

What if Broly was found in Dragon Ball GT? - Quora

Dragon Ball Xenoverse 2 (Video Game) - TV Tropes

DRAGON BALL FIGHTERZ – Super Baby 2 Announcement Trailer

Dragon Ball FighterZ Super Baby 2 And Gogeta [SS4] DLC Fighters Announced – NintendoSoup