Here are an assortment of designer logos. I am amazed how simple some of them can be and get so unique and distinct. Some (like Dior) are just a word with a certain font, and others (like Juicy Couture) have more intricate design. There is some overlapping, borders, and pictures that make each one different. The simple black lettering still reveals the essence of the unique symbols.
Filming a movie like Avatar is an enormous project for the graphics teams. The reason the Avatar's look so life like is based on the technology they were able to use. If you look closely, there are a bunch of tiny green dots on the woman's face in the top picture. These dots tracked her facial expressions and transferred them to the movie screen. The suits they wore while acting it out also served for the same purpose. Then the graphics filled that in creating the blue creatures that we cherish on the screen.
Starbucks started out in 1971 just selling coffee beans. But when the owner visited Europe he saw how many coffee shops there were around. So when he came to Seattle, he made a coffee shop that sold ready made coffee. This was new. As the years went by, the name simplified. Today, we know the logo as the 1992 logo; Starbucks Coffee, two stars, green, with black around the mermaid. As of 2011, Starbucks has become so successful that the brand name isn't even included on the logo. The simple mermaid does the trick.