Originally Posted by
Bored at 3:00AM
They all count in the sense that creators are now free to use the entirety of the DCU as a springboard for new stories.
If you want a clearer idea of what Superman's backstory is, it's the same one he's always had. Some details change every few years, but the broad strokes remain the same.
Currently, the only big change that's been made is the Kents are alive again. Everything else is the same. The overall arc of Superman's life is the same as it has always been.