Watch Shailene Woodley, Paul Rudd, Chris Hemsworth and More Reach into Yahoo's Mystery Box

When stars come to Comic-Con to promote their upcoming movies, they need to preserve a sense of mystery, teasing their films to screaming fans while often showing only the briefest glimpses of footage. Well, turnabout is fair play: When such stars as Shailene Woodley, Paul Rudd, Jeff Bridges and Chris Evans stopped by Yahoo Movies’ suite during the event, we dared them to reach into our Mystery Box to pick out a random geek pleasure pulled from the floor of Comic-Con. Watch as franchises collide: Avengers: Age of Ultron's Scarlet Witch, Elisabeth Olsen, selects a Hunger Games trinket and attempts to deliver the District 12 three-finger salute; Thor (Chris Hemsworth) pulls out a Batman toy, in an inadvertent (and heretical?) Marvel/DC crossover; and future Ant-Man Paul Rudd, upon receiving a Frozen trinket, delivers a brief snippet of “Let It Go.” Idina Menzel, watch your back.