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Detective comics #27
First appearance of "The Batman"
http://www.dccomics.com/blog/2014/03/27/warner-bros-entertainment-and-dc-entertainment-celebrate-batmans-75th-anniversary -
Batman #1
Batman #1 comes out with Batman against Catwoman and the Joker
http://www.dccomics.com/blog/2014/03/27/warner-bros-entertainment-and-dc-entertainment-celebrate-batmans-75th-anniversary -
Joker
Readers meet the Joker for the first time in Batman #1
http://www.dccomics.com/characters/joker -
Detective comics #38
First apperance of Batmans apprentice, Robin: The Boy Wonder, Richerd(Dick) Grayson
http://www.dccomics.com/characters/robin -
Alfrid Pennyworth
First appearance of Alfrid Pennyworth, loyal butler to Bruce Wayne, in Batman #16
http://www.dccomics.com/characters/alfred-pennyworth -
Barbara Gordin
First look at Barbara Gordin as Batgirl in Detective comics #359
http://comicbookdb.com/character.php?ID=425
http://comicbookdb.com/issue.php?ID=1022 -
Jason Todd
First look at Jason Todd as the secon Robin in Batman #366
http://www.comicvine.com/jason-todd/4005-6849/forums/jason-todds-first-appearance-418850/
http://www.comics.org/issue/38010/ -
Nightwing
First appearance of Dick gayson, the first Robin, as Nightwing in Tales of the Teen Titans #43
http://www.dccomics.com/characters/nightwing -
Death in the Family
Jason Todds death was put to a vote. With the majority saying yes, the wrighters had Jason Todd Killed by the Joker
http://forum.rpg.net/archive/index.php/t-199590.html -
Cassandra Cain
In Batman: Legands of the Dark Knight #120 we see Cassandra Cain, Batgirl #3, for the first time
http://comicbookdb.com/character.php?ID=1747 -
Tim Drake
First look at Tim Drake, who will become the third Robin, in Batman #436
http://www.ign.com/top/comic-book-heroes/32 -
Stephany Brown
Stephany Brown, the forth Robin and only female Robin, Shows up in Detective comics #647
http://dc.wikia.com/wiki/Stephanie_Brown_(New_Earth) -
Red Hood #2
In Batman #635, readers meet Jason Todd, Revived by Raz Al Goul, as Red Hood
http://www.dcuguide.com/who.php?name=redhood2 -
Batgirl #4
In Batgirl #1, you see Stephanie Brown as Batgirl for the first time
http://comicbookdb.com/character.php?ID=34596 -
Red Robin
In Red Robin #1, Tim Drake is introduced as Red Robin
http://new.dcuwiki.net/w/Red_Robin_(Tim_Drake) -
Damion Wayne
First appearanc of Damion Wayne, the 5th and final Robin to date, in New 52: Batman and Robin #1
http://www.dccomics.com/characters/damian-wayne -
New 52
Batman makes his first appearance in the New 52: Justice league #1
http://www.dccomics.com/characters/batman -
