What the title says. For me I would use ideas from DC: The New Frontier by Darwyn Cooke. You already have a shared universe where you already have the big established Golden Age heroes like Batman and Superman, but it also introduces new heroes such Barry Allen/Hal Jordan/Martian Manhunter. All of their stories(most of which were origins/the early years for the new heroes) each intricately intertwine with each other's along with an overarching plot of an invasion which forces the JLA to assemble at the end. It could also carry over the same themes/ideas that I see will be explored in Man of Steel like trusting these "hero figures", the idea of saviours, etc that critics might like. On top of that in the big battle, Hal Jordan really shines(no pun intended) as Green Lantern and it might redeem the character movie wise if they followed something similar. He basically had a moment like Hulk in the Avengers movie. All you have to do is fast-forward the setting 50-60 years, only have a line up consisting of: The Trinity, Flash, GL, Martian Manhunter, with the existence of other heroes and vigilantes as Easter Eggs. Oh and instead of an island full of Dinosaurs as the main villain, let's have Brainiac and his robots trying to shrink cities all around the world like Gotham, Metropolis and Themyscira. It would have a similar premise to this: [YT]eK41bdkysE0[/YT] Now getting back to the topic, what story lines from comics would you use?