Trailers Weekly is a feature in which we bring you the most popular and talked about trailers of the week. Sharing trailers is a classic viral practice, and trailers are still the most mainstream way for people to learn about movies. Since it is a holiday week, there were only a few trailers released this week. Universal Pictures’ animated comedy Hop, Disney’s Mars Needs Moms, and a special trailer commentary from Jon Favreau for Cowboys and Aliens