Book excerpt: Great Scott! Pop-culture juggernauts collide in the ultimate 1980s (and 1950s and 2010s) showdown! Things are getting heavy--and nothing's as heavy as a Cybertronian! Marty McFly has just returned from the adventure of a lifetime to a new, better Hill Valley--everything's looking up for him! That is, until Marty and his friend Doc Brown's time machine attracts the attention of the Decepticons! With one small mistake, Marty finds himself once again thrust into adventure to stop the Decepticon plot in the past, present, and future... all with the help of a new time machine... the Autobot Gigawatt! A must-read for fans of both franchises, this all-new adventure from writer Cavan Scott (Star Wars: The High Republic, Star Wars Adventures: Tales from Vader's Castle) and artist Juan Samu (Marvel Action: Black Panther) is jam-packed with thrills and humor. Featuring Bumblebee, Biff, Optimus Prime, George McFly, Megatron, and more!