Flash gets resurrected from his remains the issue after his death in #4.
Bad Future: Peace in the galaxy is broken after The Five toppled governments and slaughtered billions, and the Green Lanterns are wiped out, having become the most hated group in the universe.
Blood Knight: Wonder Woman loves to fight and would rather talk with her fists than her mouth.
Body Horror: When the League battles Locus, she eviscerates the Flash with a thought.
Brain Bleach: Subverted by Wonder Woman when Superman mentions his memories of their former relationship - she simply notes her relief that her memories of the relationship remain a blank.
Came Back Wrong: The League are clones of the originals, but lack chunks of their memories and their personalities don't quite match up, whilst Superman lacks his heat vision and flight and Flash lacks his protective aura.
The Cape: Green Lantern holds the personality closest to a classic hero's, and indeed his cloak is his most defining physical feature.
Character Development: In issue #3, Superman starts to show signs of a conscience. Considering how much of an arrogant jerk he is, that's saying a lot.
Cloning Blues: The Flash questions if he and Green Lantern were really best friends, or if they're just programmed to think that. Batman and Green Lantern both note that they remember him being "sunnier". It turns out they're not really clones at all.
For Science!: Terri's motivation. Terry is slightly more idealistic.
Green Lantern Ring: Green Lantern's cloak mimics the abilities of the traditional Green Lantern ring. He complains that the ring was better.
The Heart: Green Lantern, who tries to placate Batman and Superman.
Heroic Albino: Well more anti-heroic albino. Terry at least genuinely believes in the League and wants them to fix the galaxy's problems, but both of their actions are very morally questionable, such as cloning and tampering with the League.
Legacy Character: The series focuses on the successors of the original Justice League.
Legend Fades to Myth: The tales of the original Justice League have since become fairy tales with multiple interpretations. They think Superman's origin was either an alien landing on Earth, or a farm boy finding a magic cape.
The Needs of the Many: The revelation in #4 that the killing of a person is needed to resurrect each League member raises this as an issue.
Past Life Memories: The League's are incomplete, causing a large shift in their personalities without their nurture tailoring their nature. They know who each other are, but have no memory of being friends or a successful team. Superman lacks his memories of being raised as Clark Kent, and Batman his parents' deaths.
Reality Warper: Locus. She's so powerful, the Wonder Twins order the League to retreat from the planet that she is on. They don't and a Curb-Stomp Battle ensues in her favor.
Really Gets Around: Wonder Woman is much more forward now, propositioning Batman and Green Lantern. The only man she won't have a go at is Superman.
Superman's eyes tend to glow red when he gets angry. Which, given his new personality, happens a lot.
Required Secondary Powers: Notably averted by the Flash, who doesn't have the aura protecting him from friction as he runs at super speed and requires forcefields to replicate the effect.
The Reveal: The League are not clones at all. The Wonder Twins instead overwrote the memories and DNA of five people with the original Justice League's DNA using nanotechnology, essentially killing these five subjects.
The Sociopath: In issue #3, armed forces make Superman, Batman and Wonder Woman surrender by threatening to gun down the innocents around them, aware that their weapons can't harm the League. Batman quickly gives in, but Wonder Woman couldn't care less.