I am fan of the the comics and would like to dive into another superhero run that has the struggles of character growth and comes with a definite ending unlike any of the majority of the ongoing DC/Marvel century old never ending series.

Would be preferable if our protagonist starts out young, but even an older superhero would do. A focus on battles with realistic power scaling like the one in Invincible where the characters have fixed levels but also grow stronger with more training/experience would be great.