‘Supergirl’ Flashes Another ‘Legion of Super-Heroes’ Easter Egg Before Crossover
Just days after we first learned that The Flash would race over to Supergirl by March’s end, The CW teased their first official crossover with a vision of Kara in Barry’s “Welcome to Earth-2.” Eagle-eyed viewers also spotted a Legion of Super-Heroes easter egg as well, which tonight’s Supergirl revealed as another connection between the two worlds. What could it mean?