So I've started reading some of these New 52 relaunch titles, and I'm a little confused on how the timeline is working out.
Nightwing #3 opens with a "five years earlier" flashback to when Dick Grayson was still with Haly's Circus (so presumably the events in the flashback occurred before his parents were killed). I'm not seeing how five years is a plausible timeframe in which Bruce could train Dick to be Robin; Dick could shed that identity and become Nightwing; Jason Todd could be trained and be killed; and Tim Drake could both be trained as Robin and then take on the Red Robin identity so that Damian could be Robin.
In the former timeline this all took place over, at most, a six or seven year period, so its not much different
In 2006, it was mentioned that it had only been two years since Superman had died. By that logic, it had been three (or maybe four) years since Dick became Nightwing.