The fifth annual Arrowverse crossover is coming up soon, with some body-swapping and bizarre hijinks. In preparation for the three-night event, The CW has released several teaser trailers showing some of the strange scenarios that’ll unfold in the event.

Elseworlds sees reality rewritten with characters taking on different heroic personas and some drastically different relationships. Green Arrow, Supergirl, and the Flash travel to Gotham City to confront Dr. John Deegan, regarding his work at Arkham and his hand in the current state of events.

In the teaser spots we see very confused versions of Oliver and Barry who have switched places, with Oliver waking up in Barry and Iris’ apartment and Barry sparring with Diggle. In the third spot, Supergirl is in a STAR labs containment cell, imprisoned by her sister, Alex. The fourth spot teases the introduction of Batwoman and the grimness of Gotham City.

The crossover will run on Arrow, The Flash, and Supergirl, on Sunday through Tuesday, December 9-11, 2018. Batwoman (Ruby Rose) and Lois Lane (Elizabeth Tulloch) will be introduced in the event, which will also include appearances by Superman and John Wesley Shipp sporting his 1990s costume from The Flash.