DPxDC: Accidentally Aliens
Team Phantom (Danny, Dani, Sam, Tucker, Valerie, and Jazz) end up having to flee Amity and Earth (maybe the anti ecto and the GIW tries to nuke Amity) and the Fenton parents (who know about Danny) shove them into the Spector Speedster tell them that they love them all like their kids and shove them through the portal shutting it behind them.
The last thing that the kids see is the portal closing behind them and a flash. All of them have powers and are liminal to some extent. Jazz even has her own transformation and they all don't look human.
The Specter Speedster bursts through dimensions and ends up in DC. The JL sees a space ship pass the Watchtower and a few people are dispatched to check it out and possibly welcome the people.
They open the pod and it's a bunch of what look like very inhuman kids in protective suits of some type. When they go to wake them the two that look the most similar babble at them in a very nonhuman language and Green lantern is sent in to get a universal translator going. Because of the ecto and the differences at earth, the kids mostly use infinite realms terms and concepts (this will be important later)
The kids tell them that their Home "Amity" was at war and that the enemy was using what they called "ecto-nuclear fusion weapons" and the last thing that they saw when they were shoved into the "speedster" was the "Phantoms" parents trying to protect them and a flash of blinding light.
The Kids are introduced as "Phantom", "Phantasma", and "Specter" all of one family. With blinding white hair and Green eyes for the younger two and the eldest had bright green hair and purple eyes. She blushed green when asked "I took after Mom, my little siblings took after dad."
The others are "Huntress" who has light purple skin unlike the Phantoms and has a green set of armour apparently under her skin, "Nightshade" with pale green skin and bright purple hair and eyes, that touches the earth in almost awe and is immediately wrapped in plants "Some of them feel almost like home." And "Dullman" who the others called "Tuck" and they wouldn't explain where the nickname came from who had what looked like hieroglyphics (but wrong somehow) in gold on his light purple skin.
When asked if Huntress and Dullman are related they both looked disgusted "Is it because we have the same color skin? Just because we're the same race doesn't mean we're related. We're actually in a haunt with Phantom both of us and Nightshade."
When questioned on what a haunt is they look startled. "Do you not have haunts here? What about frights? It must be so different if you're a loner species!"
"I believe that it's an error in translation. If you would be so kind as to explain." Batman was gentle they were in fact children. It was Specter who stepped forward
"So you have your 'lair' which is the place you belong to where you find your 'frights' and usually your 'haunts'."
"Sounds like a town or maybe home?"
"Your fright is the group of liminals you belong to, usually including your parents, guardians, adults, any same (with that she gestures to her siblings) chosen sames, and your closest liminals. All of us are part of the same fright though some of us belong to multiple."
"So similar to a family and friends but the concepts might be broader and more mixed."
"And finally your haunt," she smirked teasingly at her younger brother, "Are your chosen, the ones that are infinite, a choice and a constant demonstration. Many people only haunt with only one or two others my little ghost got three." Phantom is blushing green and the others of the 'haunt' are also flushed as they curl around each other. And the JL members notice what they hadn't before, that Nightshades plants reach out to the other three, that each of them except Dullman have what looks like kiss marks in gold on their knuckles, that each of them has a little hair pin with constellations they don't recognize, and the way they stand close together.
"I believe that a haunt is their way of saying a close relationship, likely romantic."
"Our parents haunted with our guardian Plasmius off and on, but our other guardians didn't haunt with them. That's not common, usually you raise your frightlings with your haunt and any additional members of your fright, but your fright is always flexible."
When asked about their fright their responses varied
"My grandmother and plant father" Nightshade "and these problems, plus Draconess Dora and the Phantoms parents."
"My parents and Phantoms parents, some of the tombs frightlings, and maybe Technus. Plus my darlings."
"My father, maybe Technus and Skulker, Plasmius, the Mad Phantoms and these dorks."
Phantom started listing off "Mom and Dad, and Plasi no matter how much I'd like to deny, Dorathea, Auntie Pan, Frostbite, Clock-pops, maybe Ember and Kitty and 13. Those are a pair, and of course my sames and my haunt."
"My list is different." Phantasma stated "I just turned 3 so mines a bit less. My dad Plasmius, my mom Mad, my papa Jackie. Plas always said that Jackie made everyone look at him, I never found out if that's because Plas found him attractive or the way he would bust down any wall in his way. I have my sames, though I'm a mirror born so I'm closer same with Phantom than Specter. Um Uncle Nightmares likes me too!" Phantom smacked himself and let out a word that needed no translation
"I forgot about Frighty. And Pariah. Is he fright?" Specter shrugged
"Technically. I mean you're set to inherited his throne so as his successor he made you fright."
Basically all of them info dumping in a way that makes them seem really alien. And confusing the entire league.