Brolly might be the most overrated villain of all time.
Dude has no real backstory, no real motive (Kakarot was crying too loud when we were babies
), no personality, no interesting powers (just a Super Saiyan on roids), and no goals other than destroying shyt for no reason.
How could you even have a Brolly arc? The character is too one-dimensional to do anything other than try to destroy everything. I mean, Beerus wants to fight a SSG, Frieza wants revenge on Goku, Champa wants to prove he's better than his brother, and Zamasu/Black think mortals are evil and should be eliminated. Brolly wants....what exactly?