‘Flash,’ ‘Arrow,’ ‘Supergirl,’ ‘Legends Of Tomorrow’ Crossover Spoilers: Oliver-Kara Not In Good Terms? Wild Dog Unimpressed With Metahumans

The CW's epic four-way crossover will bring the heroes from "Arrow," "The Flash," "Supergirl," and "DC's Legends of Tomorrow" together. The superhero event will air in November and will showcase how the characters will react to Kara a.k.a. Supergirl (Melissa Benoist), who's one of the very few aliens that they have met.

"Arrow" characters will open up their hearts to Supergirl but the show's titular hero, Oliver Queen (Stephen Amell), will have a hard time adjusting to the Kyptonian's presence. In a press screening of this week's episode of "Supergirl," executive producer Andrew Kreisberg said that the Green Arrow has "kind of hit his breaking point for things he's willing to accept," Entertainment Weekly reported.

"He's had Mirakuru soldiers, the Lazarus Pit, magic, and Damien Darhk, but flying aliens who can incinerate you with their eyes is one beyond the pale for him," Kreisberg continued, as quoted by EW. "He's keeping his distance, which is a very Oliver thing to do. Even Kara comments, 'Does he not like me?' Barry's like, 'No, that's kind of how he treats everybody.'"

Sara (Caity Lotz) and Diggle (David Ramsey), meanwhile, will accept Supergirl instantly. The former will even have a little crush on Superman's cousin. Barry/The Flash (Grant Gustin) have already met Kara, so he's already at ease with her.

The superhero crossover's villains are the Dominators, a technologically advanced alien race who will team up with other extraterrestrial groups to invade Earth. According to The Hollywood Reporter, the Dominators were fascinated in the human race's genetic potential or the fictional biological variant called metagene. The latter causes ordinary humans to mutate into metahumans with special abilities and powers.

In DC Comics -- which the mega crossover was based on -- the Daxamites were part of the alliance. It should be noted as well that the newly arrived Mon-El (Chris Wood) on "Supergirl" came from Daxam.

Rick Gonzalez's Wild Dog from "Arrow" will also appear in the superhero crossover event. Wild Dog will demonstrate a "huge dislike" for metahumans and he will not go along well with The Flash and Supergirl, ComicBook.com reported. Instead of being amazed about the metahumans' special abilities, Wild Dog will dislike them because of what "they bring to the table."

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