Though the 2017 Arrowverse crossover may center around the wedding of Barry and Iris, the real star of the story will actually be Oliver Queen. Arrow executive producer Wendy Mericle teases that the crossover will also explore "the question of true love" for Oliver and another character.
"Crisis on Earth-X" will be a four-way crossover between Arrow, The Flash, Legends of Tomorrow, and Supergirl. Described as a "four-hour movie," the crossover will bring the casts of all four shows together for the much-anticipated wedding of Barry and Iris, only to have it interrupted by the arrival of the heroes' evil counterparts from Earth-X, a reality where the Nazis won World War II. "Crisis on Earth-X" will also feature The Ray, played by Quantico's Russell Tovey.
In speaking with TVGuide, Wendy Mericle revealed surprising details about the crossover. Though Crisis on Earth-X" will feature the wedding of Barry and Iris, the crossover is "really Oliver's story."
It's Oliver and one other character in the Arrow-verse's story. It really explores the question of true love, and what does that look like? It's emotionally really compelling, and you're going to be surprised by what he learns and how he learns it and who he learns it from. It's pretty crazy stuff, I'm not going to lie.
Mericle doesn't reveal "who he learns it from" but many fans are sure to speculate that the character mentioned by Mericle is Felicity. The will they-won't they dynamic that slowly developed between Oliver and Felicity over the first two seasons grew into a romantic relationship during season 3. Felicity broke it off in episode 15 of season 4. The possibility of resuming the relationship was occasionally hinted during season 5, particularly in the season finale, "Lian Yu," when the two kissed.
The idea that "Crisis on Earth-X" is "Oliver's story" could have some connection to Prometheus-X, the Earth-X counterpart of the main villain from season 5. Prometheus physically and emotionally tortured Oliver across several episodes, and even managed to convince the hero to give up being the Green Arrow. Oliver's retirement was temporary, but even so, Prometheus' actions are expected to have a long-lasting impact on Oliver. Fans can expect his Earth-X counterpart to be personally challenging for Oliver in one way or another.
"Crisis on Earth X" takes place across two nights on Monday, November 27 and Tuesday, November 28 on The CW. Supergirl and Arrow will air on Monday and The Flash and Legends of Tomorrow will air on Tuesday.