Board Thread:News and Announcements in game/@comment-32271305-20171228140612/@comment-32378690-20180104152848

In the animated promo of Dragon Ball Z: Dragon Battlers that showcased both Super Saiyan 3 Broly and Super Saiyan 3 Vegeta, Super Saiyan 3 Broly is shown to have defeated Super Saiyan 3 Goku, and even when Vegeta shows up in his Super Saiyan 3 transformation, Broly simply powers up and confidently challenges them both

Also would explain why we have an SSJ3 Vegeta in the game but have never seen one in the anime or manga