Originally Posted by The Joker
Joker: "A year ago these Cops and lawyers wouldn't dare cross any of you"
right, but that doesn't mean Batman Begins took place one year ago,
it's just like saying " a year ago you could get a cheeseburger for $1" and the price might have gone up 6 months ago..
It's just a general statement of time, imo
but it could refer to the BB timeline of course