The number of Marvel comic heroes is constantly changing and growing. As of now, there are well over 8000 characters, but new ones are always being introduced.
Yes. Iron Man's demise was depicted in certain Marvel comic books. The circumstances and implications of his death were explored, and it had a ripple effect on the characters and plotlines within the comic book world.
Oh, yes! Marvel is not just a comic book series; it's a huge universe of comics with countless heroes, villains, and epic adventures. The series has grown and evolved over time, becoming a cultural phenomenon.