POP: DC COMICS- 80TH RED RAIN BATMAN (1991)

When Batman discovers Count Dracula and his minions feeding off the homeless of Gotham City. he becomes a vampire to gain the necessary strength to defeat Dracula, developing a thirst for blood in the process that not even he can control.
Here we have Batman in his vampire form as he appears in the Red Rain novel, complete with red eyes, fangs and blood-soaked mouth