News dropped earlier today that longtime Batman editor Mike Marts is leaving DC Comics for a high-level position at industry rival Marvel.  Marts returns to Marvel, where he worked as an editor from the mid-‘90s to the mid-aughts, as the new Executive Editor.  Many creators and editors sounded off on Twitter regarding Marts, and the move:

Batman, Detective Comics writer Scott Snyder

Detective Comics writer and Chew co-creator John Layman

Marvel Editor-In-Chief and former Vertigo Editor Axel Alonso tweeted this photo:

This move is significant considering the Batman family of books at DC is perhaps one of the highest-selling and most influential lines in mainstream comics.

Notably, Mike Marts oversaw Grant Morrison’s epic, multi-year Batman saga, and introduced superstar Scott Snyder in the pages of Detective Comics when he was still a relative unknown.