An anthro muscle version of Ace the Bat-Hound (German Shepherd).
I've given some thought to how a dog dressing up like a bat would be viewed in a society where anthro bats also exist. But I decided that it just wouldn't be recognizable as Bat-Hound without the bat symbology. So here are a few options on how you can take this:
Also, regarding the bat signal being behind him, I assume he's already seen it, and is looking down at some trouble in the street below.
Link
Vulpine-Knight
Always cool to see Ace anthro-ized. Badass work.