10 Biggest Arrowverse Moments Of 2016
4. World's Finest
Crossovers have been happening in the Arrowverse since the first time Barry Allen set foot in Starling City and helped Team Arrow. Barry and Oliver have since teamed up on a handful of occasions to stop common enemies, but the World’s Finest crossover was an entirely different animal.
Crossing over universes and networks (CW and CBS), Barry sped into National City and instantly legitimized Greg Berlanti’s newest creation, Supergirl. Because of this event Krypton, Superman, and several other DC staples now existed in an established and shared continuity.
Not only was it a historic crossover, but it was also a very entertaining episode. Barry got to interact with team Supergirl, and Livewire and Silver Banshee gave both heroes a big battle before finishing with the Flash returning home to Earth 1. At the time, fans did not know that this was only be the first time Barry and Kara would meet. There was another, bigger crossover coming when Kara would be introduced to the rest of the Arrowverse.