Warner Bros. is making sure you don't forget about Gangster Squad, director Ruben Fleischer's crime drama that was delayed until January 2013. Following the second trailer that debuted yesterday, the studio has unveiled five new character posters, featuring Josh Brolin, Ryan Gosling, Sean Penn, Emma Stone, and Giovanni Ribisi. These posters prove you always have to watch your back in Los Angeles, as we can also see cast members such as Nick Nolte and Anthony Mackie looming in the background.