SPOILER WARNING: This article contains major spoilers for "Elseworlds,” this year's Arrowverse crossover.
The annual Arrowverse crossovers have become a high point in The CW’s DC Comics-inspired superhero lineup, and this year was no different. With the three-part “Elseworlds” event bringing together the heroes and supporting cast of Arrow, The Flash and Supergirl (plus a welcome Legends of Tomorrow cameo), there was plenty of spectacle to satisfy longtime fans and newcomers alike.
Of course, no Arrowverse event would be complete without plenty of Easter eggs for diehard DC fans across all mediums, from TV to movies to the comic book source material itself. That being said, let’s take a look at some of the best Easter eggs “Elseworlds” has to offer.
Before the Arrowverse came to be, Smallville was The CW’s premiere superhero drama, so it’s only natural that “Elseworlds” would pay homage to its predecessor. In fact, the crossover wastes no time in doing so by giving viewers a glimpse of the Green Arrow costume worn by Justin Hartley on the corpse of the Earth-90 Emerald Archer during the cold open, which also served as a post-credits scene on last week’s Supergirl.
However, while fans would be forgiven for not recognizing the costume, there was no mistaking the sound of Remy Zero’s Save Me – the song that kicked off each episode of Smallville for 10 straight seasons – which played when Barry and Oliver traveled to the Kent Farm on Earth-38. And if the Kent Farm and house looked familiar, that’s because they were the very same ones used on Smallville.
Barry’s Lightning Rod
While Barry and Oliver are privy to their rewritten reality from the start of “Elseworlds,” they soon discover they’re the only ones. In an attempt to get through to Iris, Barry (who she believes is Oliver) tells her that she’s his lightning rod, and while this doesn’t undo the effects of the Book of Destiny, it does give her a reason to trust him.
Barry referring to Iris as his “lightning rod” isn’t necessarily new to the Arrowverse, as he did the same in Season 4’s “Enter Flashtime.” However, the term itself stems directly from the comics – specifically Geoff Johns and Ethan Van Sciver’s The Flash: Rebirth.