Other People's Heroes by Blake M. Petit

Josh Corwood has spent his life admiring the superheroes that protect Siegel City. He's wanted to join them, wanted to be like them... but eventually, had to settle for reporting on them from the sidelines. When an undiscovered talent reignites his hope to join the world's protectors, he suddenly discovers that their world isn't everything he'd been led to believe. Surrounded by false idols, Josh decides to turn the tables on them and reveal the greatest con game in history... and hopefully, in the process, find the real heroes that have long been gone.