This year's DC TV crossover begins with Supergirl in Crisis On Earth X Part 1! Spoilers ahead in our review...
This review contains spoilers.
See related Dark Universe: the undignified death of a cinematic universe
3.8 Crisis On Earth X Part 1
We were promised a more serialised crossover this year, and Crisis on Earth X Part 1 delivers on that front. In past crossovers, there was a clear 'home court advantage' so to speak. That is to say, while the characters concerned with the main action appeared throughout the crossover, each episode generally took on the characteristics of the show the time slot belonged to. There were also usually side characters who only got to participate when their show's episode brought the action into their orbit, whether physically or otherwise.
If Crisis on Earth X were to follow that model, Barry and Iris' wedding would likely have had to