Batman-DCBU-Main Continuity Timeline

Thirty Two Years Ago

 * Bruce Wayne is born

Twenty Two Years Ago

 * Martha and Thomas Wayne are shot by Joe Chill

Twelve Years Ago

 * Bruce Wayne leaves Gotham at the age of Eighteen to explore the world.

Eight Years Ago (Year One)

 * Bruce returns to Gotham and becomes the Batman.
 * On Christmas Day, Bruce fights the Red Hood Gang, and causes the birth of the Joker.

Seven Years Ago (Year Two)

 * Dick Grayson becomes Robin at the age of 15.

Six Years Ago (Year Three)

 * Barbara Gordon becomes Batgirl at the age of 14
 * Batman allies himself with Jim Gordon, the Bat-Signal is built.

Five Years Ago (Year Four)

 * Dick Grayson becomes Nightwing
 * Batman founds the Justice League
 * Jason Todd becomes the second Robin at the age of 14

Four Years Ago (Year Five)

 * Todd is killed by the Joker
 * Bane breaks Bruce Wayne's back. The latter temporarily gives the mantle to Dick Grayson.

Three Years Ago (Year Six)

 * Bruce Wayne resumes his role as Batman.
 * Tim Drake becomes Robin at 16

Two Years Ago (Year Seven)

 * Barbara Gordon is shot by the Joker, and becomes Oracle.

One Year Ago (Year Eight)

 * Jason Todd is revived as the Red Hood.

Now (Year Nine)

 * Barbara Gordon heals, and returns to the mantle of Batgirl.
 * The Riddler creates a chip that can access anything in Gotham. (The Key to Gotham)

Ten Years in the Future (Year Nineteen)

 * Superman becomes the ruler of Earth, and Batman forms a rebellion.

Twelve Years In the Future (Year Twenty-One)

 * Batman kills Superman.

Nineteen Years In The Futrure (Year Twenty-Eight)

 * Terry McGinnis becomes Batman.