In Showdown, arch enemies Optimus Prime and Megatron clash for the last time! Only one will walk away from the ultimate battle between good and evil, and the outcome will forever change the course of the war between the Autobots and the Decepticons. Plus, the debut of Omega Supreme and the Special Teams, and the shocking rise of RAAT (Rapid Anti-robot Assault Team)!With a new introduction by long-time TRANSFORMERS writer Simon Furman, plus incredible background material created exclusively for this book.