Well, watching it right now the second time and I THINK the implication is that destorying Earth Prime would cause a chain reaction that would destroy all Earths and take their respective realities with them.
Of course by this point in time Krypton and Mars are non-issue (Krypton is just a bunch of rocks around the gaseous remains of the planet and Mars is a barren and lifeless planet) so it wouldn't matter.
I think Owlman's end game wasn't to destroy all life in the universe, just every earth in existence and all the life on it. So all non-earth planets would be safe.
-Anything you can do I can do better- Spoiler tags are cool. : D
It wouldn't, it's just poorly written trash like 99% of comics, books and movies.
It's based on a stupid story that dc tried to pass off as interesting that really served as a means to correct the many mistakes they made through the years with regards to continuity. I guess they didn't realize how obsessed people would be by the 1980's.
James Woods saved this stupid movie, especially his last line.
"It's based on a stupid story that dc tried to pass off as interesting that really served as a means to correct the many mistakes they made through the years with regards to continuity. I guess they didn't realize how obsessed people would be by the 1980's."
Do date, they still do. I miss when comics and works of fantasy didn't try to pander realism and realistic people.