Example Series Frameworks
Power Levels
Heroes cover a diverse range of power levels, from the first costumed adventurers of the Golden Age, who relied solely on their skills and a few gimmicks (and modern vigilantes of the mean streets, who do much the same), to the greatest protectors of the world, who take on cosmic threats on a regular basis. The following are descriptions of different power levels unfortunately the math hasn't been done therefore exact numbers are not provided. But the descriptions still provide a scope suitable for different games:
Masked Adventurers
This power level fits the "Mystery Men" era of the Golden Age of comic books, as well as for teams of mostly non-powered adventurers: heroes who rely more on their skills and wits (and maybe a few gadgets) rather than amazing powers. Heroes should be well-rounded particularly if the emphasis is on skills and advantages--and maybe a power or two--rather than a lot of powers.
Super Heroes
This power level suits mature and experienced "adventurers" of the previous level along with a wide range of younger or focused superhumans.
Big Leagues
This is where you find many of the more experienced and powerful heroes. They are "senior" heroes, usually with considerable capabilities (and, often, experience). Those lacking superhuman powers have amazing levels of skill and resources to draw upon while the superhuman types are often among the most capable in their particular area, often worthy of titles like "King" and "World's Greatest".
World-protectors
Heroes at this level are among the most powerful beings of the universe. They are largely capable of ignoring lesser concerns and tend to focus on "big picture" problems like alien invasions and world-conquerors along with natural disasters (although they may still handle some of the "small stuff" as well).
The follow series frameworks provide the Gamemaster with some ideas and models for running a series in a variety of different styles, from high-powered heroes safeguarding the world to people with no powers but a lot of determination working to try and make their corner of the world a better place. Each framework has a summary of what the series is about, what sort of characters are suited to it, and some ideas to get you going.
Legacies
You've known each other all your lives, played together as kids, were always visiting each other's homes with your parents, and had pretty good lives together. Now you've discovered each of you has... exceptional abilities and have decided, either independently, or as a group, to become heroes! Do you have what it takes to work as a team? What do you do when all of your parents disappear at the same time? How do you deal with learning they're actually longtime heroes... or villains?
Home-front Heroes
America is threatened by the growing threat of the Axis powers. President Roosevelt sends a number of the well-known heroes across the globe to save American soldiers and perform special operations. Wisely, he also asks a number of rookie heroes to handle some important jobs, on the home-front and abroad, but also behind the scenes. Does your two-fisted hero have the guts to pass up the glory of answering the President's call to serve a higher cause?
Answering The Call
The local big-league super-team has disbanded; they might even be missing and presumed dead after another titanic battle to save the city. But the city needs its heroes, so it's up to a new group of heroes to take up the mantle and the responsibility to defend the city from threats too great for any one of them to handle. Rebuilding the team is no small task, nor is winning the trust of the city, and you can bet the old team's foes will waste no time in taking advantage of the situation. Do your heroes have what it takes to create a team of their own? What happens if they do and the previous team returns?
Across The Multiverse
In the wake of multiversal threats, including the machinations of powerful extradimensional beings, a mysterious organization has instituted a program of recruiting agents from across the various worlds. They take only the most capable, forming a powerful alliance to protect the multiverse from terrible threats and keep their timeline untangled. The characters come from many alternate worlds, but team up to keep all worlds safe, assuming the organization they work for is being entirely truthful with them...