Ranking Each Arrowverse Crossover From Worst To Best

The Arrowverse's first large-scale crossover saw the heroes team up to protect the Earth from the otherworldly Dominators. It works due to its exploration of the fallout from Flashpoint and the dynamics between the heroes, especially now that Supergirl has been introduced to the heroes of Earth-1.

The episode sees a brief skirmish between Oliver and Barry and the mind-controlled heroes, captured heroes, and the eventual heroic team-up to stop the alien invasion.

The crossover succeeds in character work by examining the tension between the heroes due to Barry's actions as well as Oliver's initial mistrust of Kara due to his apprehension towards her alien origin. It also deftly weaves the Dominators into the Arrowverse, and connects their involvement in historical events and the metahuman phenomenon fairly seamlessly.