Today, Bandai Namco has revealed something new for the upcoming Dragon Ball FighterZ, though today it’s not directly related to the game. Instead, we got the announcement that two GameStop exclusive figures are coming out that are related to FighterZ, featuring the suppoedly evil versions of Goku and Vegeta. However, the figures inadvertently reveal a bit about the fighting game’s plot.
Here is the tweet that provides a bit of insight into the Dragon Ball FighterZ story:

The clones have ARRIVED to threaten the safety of the planet!
Limited Edition GameStop-exclusive Dragon Stars figures from the upcoming DRAGON BALL FighterZ game are available for pre-order now! https://t.co/lDEMLMNHI0https://t.co/327YkxT4oY@BandaiNamcoUS @GameStop #FighterZ pic.twitter.com/evNE5Ge2TZ — Bandai America (@BandaiAmerica) November 20, 2017

Do you see the tidbit" I’ll give you a hint, it’s in the first sentence! Bandai America’s tweet states that these figures are clones, that threaten the planet. While it was likely obvious from the clones’ color scheme, this confirms that the clones are in fact evil. Additionally, combined with other information that we know about the game’s plot, Android 21 is using the clones in some way to take over the world.
Need a broader overview of Dragon Ball FighterZ’s Story Mode" We have more information on the mode:
DRAGON BALL FighterZ?s story mode links players with the body and mind of Goku ...