The new "Trolls World Tour" is set to hit theaters on April 17, 2020, and we got a look at the trailer in which Justin Timberlake and Anna Kendrick return to save the Trolls universe from a hard rock takeover. In the new film, Timberlake and Kendrick’s characters,Branch and Poppy, discover they’re part of one of six troll tribes scattered across different lands devoted to different kinds of music (funk, country, techno, classical, pop and rock). All that music, however, ends up at risk when the rock trolls, led by Queen Barb and her father, King Thrash (voiced by none other than Ozzy Osbourne), set out to “unite the six strings” and rid the world of every genre but rock.