The current situation with Superman on the big screen makes me sad, I honestly hope that they aren't trying to scrub this iteration of Superman, I hope it's simply down to they've not found a director/script/story that their keen on giving the green light to.
Just give Superman the Thor treatment that he received in Ragnarok, he was given somewhat of a soft reboot within the MCU, they ignored/wrote out story elements from the first 2 films that they didn't like & got on with the film without getting overly bogged down with details of who, what, where & why.