Superman
The first issue of Action Comics appeared in 1938. this is a prized issue of comics because it is the first comic where superman makes an entrance.
The first issue of Action Comics had a ten cent price and was the first appearance of Superman . Copies of this book are so rare that it is not unusual for this particular issue to sell in excess of a million dollars depending on the condition of the book .
It is estimated that less than 100 copies of Action Comics #1 are in existence today. This issue is highly sought after due to the first appearance of Superman and its historical significance in the comic book world.
Spectre made its first appearance in the DC comics series in 1940. Spectre was shown in the "next issue" slip in the January issue of More Fun Comics, and subsequently appeared in the February issue of the comic series in the same year.
Julie-Su first appeared in Archie Knuckles the Echidna issue 4. but her first appearance in Sonic the Hedgehog was issue #53
Detective Comics. I believe it was issue number 27.
The first appearance of DC Comics character Solomon Grundy was in the October 1944 issue of All-American Comics. His character should not be confused with Sir Solomon Grundy that was part of the Justice Underground.
The Spring issue of Batman came out in May 1940 ; this was the first issue in his own book .Batman's first appearance was in Detective Comics # 27 which came out in May of 1939 .
As Captain America's arch nemesis Red Skull has appeared in hundreds of Captain America Comics over the years. His first appearance was Captain America Comics #1.
the 1st issue of Archie comics was in 1942 ( not sure of the month)
Joe Simon and Jack Kirby. The first appearance of Captain America was in an issue of Captain America Comics #1, which cover-dated March, 1941. Marvel Comics produces Captain America comics.
Batman was first created by artist Bob Kane and writer Bill Finger in 1939, when the legendary superhero made his first appearance in the May issue of Detective Comics.