They made it clear early on that they wouldn't be telling new versions of most characters' origins in the #1s. That's one reason they decline to call it a reboot.
I think it's a smart idea, not to start with all new origins or retelling origins for EVERYONE. It would be weird for everyone to start at the same time. In the middle of things is more dynamic.
But, still, it's a reboot. They are trying to have it both ways by not calling it such.