Welcome to the jungle. In the new trailer for Jumanji: Welcome to the Jungle, Dwayne Johnson, Jack Black, Kevin Hart and Karen Gillan appear as their game avatars (which look like the actors). In one of the trailer’s funnier moments, Hart’s avatar reveals a weakness for cake and in one of the freakier, a large cobra appears. Jumanji is set to drop December 20th. You headed back to the jungle?