We can have empires vs empires, wars, political intrigue, actual reflections of reality.
We can have planets with actual bad guys and badasses without dumb (repetitive) gimmicks like in Blerghoes or the ToP.
The enemies in the ToP were kind of wack when it concerned powers.
The best fights were between those who didn't have wacky powers (prove me wrong).
The only ningens we can't bring back are Saiyans, because Whiss made it clear that there were only a handful of Saiyans in the BotG
As long as Toriyama doesn't make gimmicky planets (like a pirate planet, a cowboy planet and other retarded shit) we may look at a real gold mine.
And it would be legendary.
The introduction of Cooler:
Cooler gets Frieza to battle the other emperors (yonkous) for supremacy, but Earth's quadrant gets dragged into the battle so the Saiyans join Frieza to protect the Earth and to fight strong enemies
It's a bit of an rehash of Radditz, but that shouldn't matter when done right.