Their are already a few Annual issues coming soon (TEEN TITANS, ANIMAL MAN and BATMAN Annual issues) now you can add one more to the list. DC has announced a new title "Detective Comics Annual" the first issue will be released August 29th.
Here is what DC had to say...
“This special Annual, written by Tony S. Daniel and illustrated by Romano Molenaar and Sandu Florea, pits the Dark Knight against the Black Mask—a Gotham City villain most recently seen during the Night of the Owls!”
Source:
The Source