1st appearance and origin of Captain Marvel, later renamed Shazam

1st appearance of the Wizard Shazam

1st appearance of Dr. Sivana, a scientific genius and the archenemy of Captain Marvel

1st appearance of Ibis the Invincible and Spy Smasher

1st team appearance of the Seven Deadly Enemies of Man, later renamed the Seven Deadly Sins

While not a precise swipe of Action Comics #1 artwork, this cover and other aspects of Captain Marvel led to DC (formerly National) filing a lawsuit against Fawcett for Captain Marvel too closely resembling Superman

Premiere issue of the series though the copyright notes read issue #2

There exists a very scarce Ashcan edition of this issue

1st appearance and origin of Black Adam, an Egyptian prince named Teth-Adam who was first granted powers by the wizard Shazam though it corrupted him

Origin of The Marvel Family: Captain Marvel, Captain Marvel Junior, Mary Marvel and Uncle Marvel

1st appearance, cover and origin of Bane

📖 Knightfall Reading Order: next Batman #484

1st appearance of the Joker

1st appearance of the Cat, Selina Kyle, later becomes Catwoman

Debut of the first Batplane which has multiple designs from one issue to the next including Batman #3 and Batman #4

💰 Batman #1 sold for over one million dollars 3x with a record-high in 9.4 for $2,220,000

1st appearance of Deathstroke the Terminator

1st appearance and death of Ravager, son of Deathstroke - appears in issue #1, not in costume

1st appearance of Wintergreen, Deathstroke's mentor

1st cameo appearance of Trigon, as demonic eyes

1st appearance of Nekron, the Lord of the Unliving, capable of raising the dead

1st appearance of Lobo

🔮 Over the past decade, big names like Guy Ritchie and Michael Bay have been attached to a supposed Lobo movie but to the dismay of many Bastiches, this never happened even though this one-of-a-kind character would have a Deadpool-like draw at the box office

1st appearance of Hunter Zolomon, later becomes Zoom, the third Reverse-Flash

1st appearance of the Scarecrow

1st appearance of Lady Shiva, mother of Cassandra Cain and mentor of Tim Drake

1st appearance and origin of Dr. Destiny

[David Thewlis cast as Doctor Destiny in the Sandman series]

1st appearance of Dr. Psycho

1st appearance and origin of Sinestro, known as the greatest of all Green Lanterns until it was discovered he used the power ring to enslave the sector he was charged to protect

2nd appearance of the Flash, Barry Allen

1st appearance and origin of Captain Cold

1st appearance of Vandal Savage, an immortal caveman warrior

1st appearance of Harley Quinn in a standard comic

[August 2022 - Lady Gaga confirmed to star opposite Joaquin Phoenix in the Joker movie sequel, rumored to portray Harley Quinn]

1st full appearance of Doomsday, mostly obscured by a containment suit with one arm bound behind his back as he wreaks havoc across the countryside

[July 2022 - DC announced a 30th Anniversary tribute of Superman #75, the Death of Superman and will introduce a new villain named Doombreaker]

1st full appearance of the Scarred Guardian, a Guardian of the Universe

1st cameo appearance of Atrocitus and the Red Lantern Corps

1st cameo appearance of Larfleeze and the Orange Lantern Corps

1st cameo team appearance of the Blue Lantern Corps

1st cameo appearance of Munk and the Indigo Lantern Corps

1st cameo team appearance of the Black Lantern Corps

Death of Anti-Monitor

Cameo appearance in background of an Alien Xenomorph, Predator and the Pale Man from Pan's Labyrinth as various Lanterns

1st appearance of Mongul

1st appearance of Black Hand, utilizes technology to drain and repurpose the power of a Lantern Ring

1st appearance and origin of Mr. Mxyzptlk

First time Superman references his ability to "fly", previously he was known to leap

1st appearance of the Wizard, William Zand

1st appearance of Per Degaton

1st appearance of Black Manta

1st appearance and origin of Hugo Strange

Debut of Batman's finned gloves

1st appearance of Krona

Origin of the Guardians of the Universe and Infinite Earths

Golden Age vs Silver Age Green Lantern

1st appearance of the Mad Hatter, Jervis Tetch

1st appearance of Vicki Vale

1st appearance of the Penguin

[March 2022 - Colin Farrell will reprise the Penguin in an HBO Max spin-off]

1st appearance of Deadshot

Classic cover art by Jim Mooney

1st appearance of Eclipso, who was at one time God's Spirit of Wrath

1st appearance and origin of Two-Face

1st appearance of Gilda Dent, the wife of Harvey Dent

1st appearance of Gentleman Ghost

3rd appearance of Black Canary

1st appearance of Merlyn

1st appearance and origin of Mirror Master

Barry Allen appears for the first time in the Flash title

1st appearance and origin of Gorilla Grodd, an ape with genius intellect and telepathic abilities

1st appearance of the Pied Piper, uses sound to manipulate others

1st appearance of Solovar, former ruler of Gorilla City

1st appearance of Weather Wizard

1st appearance of Kid Flash, Wally West

1st appearance and origin of Captain Boomerang

1st appearance and origin of Mr. Freeze, initially named Mr. Zero, later renamed Mr. Freeze in Detective Comics #373

1st appearance of Abra Kadabra, a time traveling magician from the 64th century

1st cameo appearance of Nero

1st cameo appearance of Darkseid, the ruler of Apokolips

1st appearance and origin of Professor Zoom, Eobard Thawne aka Reverse-Flash

1st appearance of Heat Wave

1st appearance of Poison Ivy, Pamela Isley

Interior pin-up poster of Batman and Robin included

1st appearance of Firefly, Garfield Lynns

1st appearance of Ra's al Ghul

2nd appearance of Talia al Ghul

1st appearance and origin of Brainiac

1st appearance of the Bottle City of Kandor, the capital city of Krypton

1st appearance and origin of Count Vertigo

1st appearance of Supergirl

1st appearance of Metallo

1st appearance of Zor-El, the father of Supergirl

Death of Hank Henshaw - later his awareness manifests inside of a machine