Batman & Scooby Doo Mysteries #3

"The hit new series teaming Batman with Mystery Inc. finds the heroes mixed and matched in surprising ways! Why does Batman join forces with Scooby-Doo, while Shaggy partners with Ace the Bat-Hound? All clues lead to the Gotham City Dog Show, where a special guest villain won’t let Batman stay a “two-dog knight” for long!"