Complex sentence: Bat-Thing is the first of the 12-part batch of Amalgam Comics issues published by DC Comics in 1997, combining elements of Man-Bat of DC Comics and Man-Thing of Marvel Comics.
Split into simpler sentences: Bat-Thing is a fictional character owned by both Marvel Comics and DC Comics, published as part of the combined Amalgam Comics one-shots by DC Comics in 1997. The character combines elements of Man-Bat of DC Comics and Man-Thing of Marvel Comics.