Since Dragon Ball FighterZ takes place during the time-frame of Dragon Ball Super, Lord Beerus is actually a playable character. I always wanted a chance to see what Universe 7's God of Destruction could do.
But you can't really play him in the story. But he does show up.
Mainly to eat Bulma's food and to advise the Z warriors.
But you think he could help them fight Android 21? No... he's too busy for that.
But you can play him in the multiplayer and other modes. While I wasn't too great with him, I like his moves. He can be really quick and fast with them as well.