I think In the new 52 his ship traveled through a wormhole to earth much like it did in Man of Steel. And even if it didn't I think relativity would be a factor, also new 52 kal was some months old when he was sent to earth.
Finally Courtney gets the spotlight, was waiting for that to happen, the fact that Martian manhunter is in on the action makes it even better! Also kinda answers what exactly happened to everybody so that's interesting.
It was a bit disrespectful imo,especially with it being superman's 75th. I didn't like that, obviously its because of batman's current popularity and all but still, i think he was just trying to appeal to the batfans( in all honestly though i don't believe Johns thinks batman stands a chance against superman)
I liked the writing and wasn't expecting that to be bad, trusted the writer and she delivered, but I just couldn't stomach that redesign. Red eye Edward Cullen with blue lines on his face and Elvis hair!! He even had pointy fangs....Oh God!!! I hated that. If I could close my eyes and have this read to me I would've enjoyed it a lot more but sadly it's a comic book, a visual medium, so I couldn't even do that! The dialogue was just sadistic enough and filled with the right amount of profanity, not much humor though which was a let down ,still i can't handle this new lobo's look (to me it's not Lobo, they should've made this a different character IMO or lobo's brother or something, this guy doesn't even have a Hog! Or a dog) maybe ill warm up to it later maybe not, time will tell.