This is a very interesting issue. Nighthawk is an alternate Marvel Universe version of The Batman, created as part of the JLA spoof-team, Squadron Supreme. In this issue, DD is searching the city for Karen Page and he comes across a movie theater, noting that criminals shouldn’t prey on people coming out of movie theaters. Which is, of course, Batman’s origin.
Then he meets Nighthawk and there’s all kinds of fights.
Creators: Roy Thomas and Gene Colan