A few ideas:
What if you invented a type of medicine or machine that was super great at first, but after it got so popular everyone in the world knew about it, you just wanted to get your name off of the billboards, and to just live like a regular person? What would be your creation? What would you do after? Stuff like that.
If you were some kind of god, what would you be? What would change or create about Earth?
Something that had seemed minor, but then later blew up and turned into a big deal.
The imbalance of power, and what could happen if an extreme about of power fell on the wrong person's shoulders?
