Ranking Each Arrowverse Crossover From Worst To Best
6. Worlds Finest
Another small-scale crossover, Worlds Finest greatly benefited from the charming chemistry between Supergirl and the Flash and solidified the multiverse as a mainstay concept in the sprawling franchise. The Flash's brief excursion in Earth-38 following a speed test gone horribly right sees him teaming with the Kryptonian heroine to stop the villainous duo of Livewire and Silver Banshee.
The two-part event served as an excellent way to incorporate Supergirl, National City, and the DEO into the Arrowverse and set up Kara Danvers as the third member of the Arrowverse Trinity, alongside Barry and Oliver. It is also the first time both Barry and Kara meet and team up with actual super-powered heroes (aside from Superman in Kara's case).
The crossover was filled with a considerable of comic book references and Easter eggs that set up future crossovers, alludes to other DC properties in and out of the Arrowverse, and is, on the whole, an easygoing event that expands the franchise's mythos.