Catwoman by Darwyn Cooke

"Longest... bomb... ever" by Retrodox

Catwoman by Jaime Hernandez

Batman and company by Philip Moy

The Joker by Dave McKean

Catwoman by Adam Hughes

Batgirl and Commissioner Gordon by Evan "Doc" Shaner

Harley Quinn by John Smith

Catwoman by Dave Stevens

Batman by David Mazzucchelli

Catwoman by Jock

Ladies of the Bat by Dustin Nguyen

Batgirl by Marcos Martin and Alvaro Lopez

Nightwing Annual #2 cover by Joe Bennett & Jack Jadson

Batman by Ashley Wood

Batman by Yildiray Cinar

Ra's al Ghul by Mike Mignola

Batgirl by Bruce Timm

Batgirl by Mike Maihack

Sesame Street vs. Batman by Matthew Benkner

Batgirl by James Jean

Batman by Mark Chiarello

Alfred Pennyworth by Brian Bolland

Batman and Robin by Yildiray Cinar

Catwoman by Michael Avon Oeming

Catwoman and Batman (and Robin) by Kevin Nowlan

Oracle by Lorena Carvalho

Commissioner Gordon and Batman by Chris Samnee

Catwoman by Alex Ross

The Joker by Brian Bolland

Batwoman by Cameron Stewart

Batman by Moebius

Batman and Robin by Alex Ross

Gotham Central by Michael Lark

Batman '66 by Michael Allred

Nightwing by Jock

Batman by Dan Hipp

Catwoman by Darwyn Cooke

Batman & Robin vs. The Red Hood by Mike Mignola

Catwoman by Adam Hughes

Batgirl and Batwoman by Bill Morrison

Catwoman by Alex Ross

Harley Quinn and Poison Ivy by Bruce Timm

Poison Ivy by Cliff Chiang

Batman by Chris Ware (much more on this here)

Anne Hathaway's Catwoman by Cameron Stewart