Re: Flashbacks, or straight forward storytelling?
It would be both sort of, like in BB. You'd have Clark going sould-searching in the present while reflecting on his past showing where he comes from and where he's going.
I'd find a traditional straightforward origin kinda boring tbh. We usually always see that. And the flashbacks possibly intercut with Krypton-scenes can make for some exiting narration.
"Anyone who has never made a mistake has never tried anything new"