Which one with Batman and Zatanna,Wonder Woman and Flash or Martian Manhunter and Green Lantern. If the one with Batman and Zatanna you need to use Batman`s bat swarm a lot if you want to kill all of the enemies,after you kill`ed all of them you need to find 2 thingis and activate them,after that you need to kill all enemies and get back where ou came from.

i just finished the alternative demension stage with zatanna and batman. i actually drew a map of where each portal sent them. killed all the enemies first, and find your way back to where you activated thoes things.

Then it`s a mission with Flash and Wonder woman I think.You need to kill all of the tentacles(and that`s a bit hard).

when your in the stage u need enter the portal the ones that have colors like red green
blue,if u can't finish it well here it is, do red,green,green,then your in a place with
bunnies,then yellow,yellow,and your done