With only a month remaining to the 2011 IAA Frankfurt Motor Show we are getting bombard with the teaser pictures of cars to be unveiled at the show. One of the most important ones, at least for us, is the new, revised Alfa Romeo 4C Concept. It is still not yet ready for production, but we can’t wait to see what’s changed in this gorgeous Italian sportscar. The picture is too dark to see anything, but it seems to have a two-tone body color.