Power Wave - The Prime Wave Accounting, #1

You know how it is for superheroes. You get your powers from a radioactive critter, a mysterious meteorite, or you just build them using your fabulous wealth and technical ingenuity. You don't worry about a day job except as a cover for getting dates, and you jet-set all over the world in search of super-powered crime that needs stopping. And even the poor superheroes have rich superhero friends and patrons.
Yeah, there are interstellar threats, but overall life is pretty good. Not in Harbor City. After heroes failed to stop the city's destruction, all the glamour was taken away. Today's supers are low-paid, blue-collar Janes and Joes who work under close police supervision, struggling by with hand-me-down equipment and their own dedication to their work. The villains, on the other hand, seem pretty well-off.
New costumes, big teams, and major heists are showing them at the top of their game. So at the top, in fact, that the cliche world-domination scheme might be starting to not only look good, but pretty damn feasible. And none of them know how they got their powers.