IGN showed off the covers for the first part of Worlds Collide yesterday, but here is the official synopsis of how everything begins to go down, courtesy of Midtown Comics.
"(W) Ian Flynn (A) Matt Herms & Various (CA) Patrick Spaz Spaziante
'Worlds Collide,' Part One. The crossover event of 2013 starts here! The Mega Man/Sonic the Hedgehog epic kicks off with a bang as the Blue Blur and Blue Bomber meet for the first time! And considering how hard they're fighting each other, it might be the last! Why are the heroes trying to take each other down? Drs. Eggman and Wily know, and they're loving every minute of it! You cannot miss this historic first meeting of two of the biggest video game icons in the entire world! Get in on the ground floor with all-new cover art by the legendary Patrick 'SPAZ' Spaziante, and choose your favorite hero with the 'Team Sonic' and 'Team Mega Man' variant covers!"