This what we roughly have in the new 52, but it doesn't really work logical imo, to have Jason and Dick that close in age you have either have Dick have Dick become Nightwing at a quite young age and/or Jason become Robin at a quite high age and kill him quite fast so you can still squeeze Tim in.
And Bruce must either start younger than usually or you must have him come together with Talia during his training, otherwise Damian can't be 10.
Btw. thanks to the Lazarus Pit, or the Dynosium or how this stuff was called, he could be physically younger than his actual age.