We're still tuned into the SEMA Show, but the news from the fast approaching Los Angeles Auto Show keep dropping in. Now we've learned that General Motors will stage the global reveal of a never-seen-before Cadillac concept study. not surprisingly, details remain slim. It could be a concept for Cadillac's recently confirmed small sedan (often called ATS), which will go up against the BMW 3-Series and Audi A4, or something different altogether. We just don't know. But feel free to speculate in the comments section below.

For the past seven years, the most important automotive design studios in Southern California compete in a Design Challenge organized by the Los Angeles Auto Show. For this year's edition of the show, which runs November 19-29, the event planners decided to add an international flavor to the contest by inviting studios from Germany and Japan to join the competition for the very first time.

The theme for the 2010 Design Challenge is the creation of a super-efficient and lightweight four-passenger car: "The objective is to envision an efficient, light-weight, four passenger vehicle (not to exceed 1,000 lbs.), that is both comfortable and safe, while delivering satisfactory driving performance without sacrificing the styling consumers demand. "

Follow the break for the first group of concept models by Cadillac, Honda, Maybach and Mazda, and stay tuned for the second part.