Not only did the actor surprise fans by appearing in the costume for a panel in Hall H, but he came onstage there in full character and took over the room, resulting in the crowd eventually chanting, “Loki! Loki! Loki!” over and over. There are plenty of intergalactic options, but we’d advise against Jabba the Hutt. When it comes to Star Wars costumes, you can go as a Jedi, a Sith, video game costume or you can go full Droid if you like.