In terms of the CW shows this is supposed be the biggest event yet. They have Brandon Routh playing as Superman once more for the event and will most like be bringing the cast of their many DC series to earth one full time.
What other surprises would you all be looking for in this multi series crossover.
I personally want to see a green lantern in the crossover at some point. They teased john diggle as being a green lantern on another earth in their elseworlds crossover.