The following contains spoilers for Dark Crisis: Worlds Without a Justice League - Green Arrow #1, on sale now from DC Comics.
The Justice League has become the focal point of Pariah's plans in Dark Crisis. The villain hopes to bring the infinite multiverse back from the dead -- and he's using the heroes of the League to do it. By separating each member of the team and creating a whole universe around that specific hero, he's managed to create enough universes with enough Crisis energy to enact his plans. Unfortunately for him, there's a major flaw that could cause his plans to go down in flames.
This flaw was highlighted in the pages of Dark Crisis: Worlds Without a Justice League - Green Arrow #1 (by Stephanie Phillips, Clayton Henry, Marcelo Maiolo, Dennis Culver, Nik Virella, Romulo Fajardo Jr. and Troy Peteri). Whilst the other issues of this Justice League tie-in have shown the other heroes cut off from everything and hopelessly trapped in their worlds, Green Arrow and Black Canary's worlds kept colliding. No matter how hard Pariah tried, the two would always find a way back to each other.
Not Even Dark Crisis Can Really Separate Green Arrow and Black Canary
The whole point of Pariah's plan was to isolate the heroes, severing their long-lasting ties to each other. It's how he's recreating the multiverse -- by making individual worlds out of individual heroes. He's even hinted that he'll abduct the remaining heroes from Earth-0 to create even more worlds to ensure the multiverse is restored in all its infinite glory. His plan relies on tearing the DC Universe apart.
However, Green Arrow and Black Canary's love for one another is so strong that it cannot be broken. No matter how many different worlds he created for them, they always felt like something was missing. They always searched for each other, going so far as to cross over to each other's worlds to do so. As Pariah required them to remain on their own Earths, this behavior simply wouldn't do. He managed to find a compromise by connecting their worlds. As a result, the heroes stopped resisting Pariah's plans. While the problem seems to be "solved" the whole ordeal highlights how doomed Pariah's plan is at the end of the day.
Pariah's Dark Crisis Earths Are Headed For Destruction
All of these characters are meant to exist together, they may be apart now, but it won't stay that way. Whilst it may seem as though the other Justice League Earths are running smoothly, they're actually deteriorating. Perhaps not at the same rapid rate as Arrow and Canary's worlds, but they're still crumbling. Dark Crisis on Infinite Earths #5 (by Joshua Williamson, Daniel Sampere, Alejandro Sánchez and Tom Napolitano) showed that Superman was fully aware of what was going on and how he learned to become lucid, giving him immense power over Pariah's Earths. Like Arrow and Canary, he rejected a world without the ones he loves. His resistance is perhaps even more impressive, as he had fake versions of his family on his Earth.
The fact that three of the Justice League heroes fought back against Pariah's multiverse without the aid of any outside force calls into question what else he has neglected. If he plans to capture all the other heroes of the DC Universe, he'll encounter even more resistance. After all, there are far more of them on Earth-0 than there are in the Justice League. Green Arrow and Black Canary proved that the bonds of the DC Universe are too strong to be broken. These characters cannot be cordoned off into their own universes to play on their own. They need each other -- and they will always find each other.