In the DC universe, the JLA are watching Dr. Doom joining the Source Wall. Hawkeye (who is also a member) flirts with Black Canary, making Green Arrow jealous. The first "dimensional glitch" occurs, with Clint vanishing. The team doesn't notice this change, but The Flash suggests they return to JLA Tower and inform their friends in the other universe about Doom's incursion.

Meanwhile, in Marvel Universe, the Avengers have just won a battle with Brainiac. Discussing the outcome, but Captain America feels that something isn't right. At that moment, Wasp announces that the JLA is visiting their reality. The two teams greet each other and head to Avengers Mansion. Both Superman and Captain America individually get the impression something is very wrong.

Suddenly, the scene shifts to JLA satelite, where the two teams are having a party with a Hawaiian luau theme. As everyone has fun, Captain America and Superman continue to have misgivings about the whole situation.

The scene shifts back to the Avengers Mansion, where Superman confides to Martian Manhunter that he feels like the entire situation feels strange - at that moment, Captain America explodes that something is deeply wrong. Wasp tries to calm him down, relating previous team-ups between the JLA and Avengers (which actually never happened), but Captain America refuses to listen, accusing Superman of the reality warping. Superman snaps back that it's Cap's fault, and both rush forward to attack each other ---

Suddenly, Vision and Aquaman find themselves in a snowy Metropolis. Aquaman notes that he still has a hand (which for him feels off), and finds a Daily Planet article with Clark Kent interviewing Spider-Man, which he says makes absolutely no sense. They are both then attacked by a group of DC villains. They are rescued by Captain America, Hal Jordan, Iron Man, Thor and Wonder Woman. Wonder Woman uses her Lasso of Truth on Sonar, who mumbles something about his "master" being trapped but trying to escape.

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