How would you incorporate........

[i'm Spider-Man]

Remember in Kingdom Come, when the aged GL had that HUUUUGE Emerald City hanging in low Earth orbit, Ever-Vigilant to threats from outer space?

I reckon, you bring back that idea, have Green Lantern and Superman teaming up with Silver Surfer, Nova and the reformed Super-Skrull to create a new team with the purpose of defending Earth from extra-terrestrial threats...

hey presto, I give you the

New Defenders

or, for a more 'planetary feel'

the Global Defenders

or, just for that more 'DC feel'

Justice League of Earth

and then as their main villains, It'd be the usual suspects - Terrax, Galactus, Shi'ar, plus maybe a new interplanetary threat from Mars... which would be where you introduce the Martian Manhunter! He'd be part of an invading force, a top-ranking officer, but he'd go rogue (for some well-thought out and perfectly logical reason), join forces with the Defenders, and put the smackdown on his fellow Martians.


GIGGIDY!

 

[i'm Spider-Man]

oh, and FLASH would operate somewhere central... Chicago, maybe. just to balance the geography of the other USA heroes a bit.