If they'd stayed with the 10yr gap then would there have been much need for this massive reboot?Does it feel to anyone else that saying that superheroes appeared 10 years ago rather than 5 would've been better? Less Robin turnover, after all.
The timing wouldn't affect the reasons for the reboot; I'm thinking that ten years would let them keep all the things they clearly want to keep fropm continuity.
Dennis, you have an odd definition of "trivia." I'm not windering how many Robins you can fit on the head of a pin, but about narrative issues: does the Batman/Robin team function effectively with a new Robin every year? Possibly so. I'm interested in seeing how it all works, but I think they might have made it easier on themselves.