Yes, Marvel Comics is a well-known publisher. It's famous for producing a wide range of comic books featuring popular superheroes like Spider-Man, Iron Man, and the Avengers.
The value of U.S. Airforce comics can vary. Older and limited editions may have higher worth. Also, if they feature significant storylines or art, that can increase their value.
U.S. Agent can be considered a good guy. He's driven by a sense of duty and loyalty, but his definition of what's right and wrong might differ from traditional heroes. However, his actions are usually aimed at achieving what he believes is best for the greater good.
The publisher of Superman comics is typically DC Comics. They have a rich history of bringing Superman's stories to readers and have built a significant fan base over the years. DC Comics is known for its quality and consistency in presenting Superman's world.
In my opinion, Capsule Corp Comics is legitimate. They have a consistent output of comics, positive reviews from readers, and seem to operate within the boundaries of the law and industry standards.