For ma and pa kent I think they are both dead, but they were able to raise superman from an older age like 5 or 6 and were able to instill in him their values, but he has to figure out how to apply them as he tries to figure out his powers and social influence. On a side note I would like to see him collapse in front of their graves in a moment of emotional weakness, having him spill his guts about trying to do the right thing and how much he misses them and how alone he feels. As for where he's been in superman 1 I think he's been at the fortress of solitude learning all the info Jor-El has stored there. As for the world killers I think they are working through luthor looking to destroy the remnants of krypton like in Earth One. Any thoughts hypotheses

Well, Justice League #2 implies that he doesn't have the Fortress of Solitude yet, but in Supergirl #2 she says he sounds like he learned Kryptonese from a text book. Also, in Action #2 he finds the ship, which speaks to him, so I'm wondering if he learns about Krypton from there rather than in the Fortress. (I would personally prefer if the Fortress is something he builds himself, rather than being crystal grown or whatever.) On top of that, the color scheme of the rocket makes me wonder if his suit of armor will actually be formed from the spacecraft itself.