Hawk Girl and Green Lantern ask Draaga to take them to War World, but Draaga takes them to the un-named main planet. War World was the moon hovering the un-named home world.
After Hawk Girl and Green Lantern have landed on the unknown planet, John Stewart's ring would know where they were.
Why doesn't J'onn just phase threw the planet-destroying weapon's outer panels and rips the guts out? Why stand there and pointlessly fight ever person in the room?
Why are the workers firing the planet-destroying weapon when the War World leader hasn't given them the signal to do so?