Attention Clark :
5 years ago: Batman fights alongside other superheroes and co-founds the JL. His existence is now revealed to the world. Also, Dick Grayson is taken in by Bruce Wayne and becomes Robin.
4 years ago: Barbara Gordon becomes Batgirl, Jason Todd becomes Robin and Dick Grayson becomes Nightwing, but stays to help train Jason.
3 years ago: Barbara is paralyzed and confined to a wheelchair. Dick leaves Gotham to create the (not) Teen Titans.
2 years ago: Jason is 'killed' by the Joker. Tim Drake becomes Red Robin.
1 and 1/2 years ago: Jason is resurrected and taken to the All-Caste.
1 year ago: Bruce "dies". Damian becomes Robin and Dick becomes Batman. Barbara has surgery to fix her spine.
8 months ago: Bruce returns, but leaves Gotham to Dick while he puts together Batman Inc. David Zavimbe becomes Batwing.
6 months ago: Jason leaves the All-Caste and becomes Red Hood.
3 months ago: After a year of re-learning to walk, Barbara becomes Batgirl again, Bruce returns to Gotham and Dick goes back to being Nightwing. Jason tries to kill Bruce, but is stopped by Dick and leaves Gotham for good.
1 month ago: Jason meets Starfire while fighting crime in Florida.
0 months ago: The New 52 starts.