So, Injustice Among Us have a storyline...
Joker poisoned Superman with kryptonite lace scarecrow fear gas
superman kills "doomsday" which is actually lois. lois and her baby dies
joker somehow link lois heartbeat with a nuke and when her heart stops metropolis go boom
superman starts a planet wide police state alongside some heroes and villian
batman led a rebel group to fight him.