'Worlds Unite: PRELUDE' - It's TWO free comic books in ONE! Just in time for the start of the ALL-NEW epic Sonic the Hedgehog and Mega Man crossover event, 'Worlds Unite,' comes a primer issue exclusively for Free Comic Book Day! The road to 'Unite' began in the history-making 'Worlds Collide' storyline, continued in 2013's 'DAWN OF X' storyline, and once again our heroes must meet-Mega Man's journey chronicled on one side, and Sonic the Hedgehog's on the other! This is the must-have primer for the biggest comic book event of 2015-as two video game icons must come together… or risk dying alone! Featuring art from both Sonic and Mega Man comic book fame!