Character and power creation in Simple Superheroes feels a bit like brainstorming. It has a framework that helps with that: each talent is given a rank (the number of dice you use), and intent (like offensive or functional) and placed in an ability category (like might or senses).
A significant portion of the book, ~40 pages of 118 pages, is a catalog of villains, allies, and opponents. Each character has some adventure seeds for how they could be used in your game.
There is a micro-scenario to get you started, and advice for city and universe creation both with lists of useful questions and examples.