Timeline

General Timeline

1992 + Batman: The Animated Series (Season 1)
1993 + Batman: The Animated Series (Season 2); Batman: Mask of the Phantasm
1994 + Batman: The Animated Series (Season 3)
1995 + Batman: The Animated Series (Season 4)
1996 + Batman & Mr. Freeze: SubZero; Superman: The Animated Series (Season 1)
1997 + Superman: The Animated Series (Season 2); The New Batman Adventures (Season 1)
1998 + Superman: The Animated Series (Season 3); The New Batman Adventures (Season 2)
1999 + Superman: The Animated Series (Season 4)
2000 + Static Shock (Season 1)
2001 + Static Shock (Season 2)
2002 + Static Shock (Season 3); Justice League (Season 1)
2003 + Static Shock (Season 4); Batman: Mystery of the Batwoman; Justice League (Season 2)
2004 + Justice League Unlimited (Season 1)
2005 + Justice League Unlimited (Season 2); Batman and Harley Quinn
2006 + Justice League Unlimited (Season 3)
2007 + Justice League vs. the Fatal Five
2040 + Batman Beyond (Season 1)
2041 + Batman Beyond (Season 2); The Zeta Project (Season 1)
2042 + Batman Beyond (Season 3); The Zeta Project (Season 2); Batman Beyond: Return of the Joker

Batman: The Animated Series
- October 19, 1992 - The Gray Ghost's renewed popularity makes it on to People Monthly, along with Matt Hagen. ("Beware the Gray Ghost")
The New Batman Adventures
- August 8, 1997 - Bruce Wayne donates $1,000,000 to the Gotham Orphanage. ("Cold Comfort")
The Zeta Project
- August 5, 2041 - Infiltration Unit Zeta goes renegade. ("Lost and Found")

Batman Beyond
- Infiltration Unit Zeta goes renegade 6 days prior. ("Zeta")
Batman Beyond: Return of the Joker
- Joker and Harley tortured Robin about 40 years prior.
Justice League Unlimited
- Dana Tan and Terry McGinnis have been dating for 15 years, while Amanda Waller and Bruce Wayne have known each other for 50. ("Epilogue")
- Superman attacked Cadmus HQ about a year before. ("I Am Legion"; "Patriot Act")
- Gorilla Grodd taking over the Flash's mind is a few years back. ("The Great Brain Robbery")