Warner Bros. released a new trailer for their upcoming movie Ready Player One yesterday. It’s based on the book by Ernest Cline and takes place in the year 2045 inside a virtual reality universe.

Ready Player One features many cameos from popular figures in pop culture, and in the new trailer we get a look at The Joker and Harley Quinn. The design for Harley is ripped right from Rocksteady’s Batman: Arkham Knight video game. Check out their brief cameo in the trailer above around the 2:04 mark.

Update: And as many Batman News readers pointed out, you can spot Batman inside the 1960s Batmobile around the 41 second mark!

Ready Player One hits theaters on March 30, 2018.