The Atom and Ace the Bat-Hound have a not-too friendly introduction in a CBR-exclusive clip from the LEGO DC Super Heroes: The Flash animated movie.

In the scene, The Atom is given a tour of the Hall of Justice, where Superman introduces him to Cyborg and Batman's canine pal, Ace.

Ace acts exactly as Batman himself would: snarling slightly and acting skeptical of anyone new. His growl cowers The Atom, who in response puts his shrinking abilities to good use. Batman explains that Ace is merely checking out The Atom, but both Cyborg and Ray Palmer agree the Bat-Hound is pretty "intimidating."

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Fans of Ace and the other furry superhero friends will be pleased to know the Bat-Hound isn't the only pup in LEGO DC Super Heroes: The Flash, as Superman's dog Krypto joins the fray as well.

Released Tuesday on Blu-ray, DVD and digital platforms, the animated movie finds The Flash in a time loop created by Reverse-Flash, who manipulates the Speed Force in order to trap the hero. It's more or less Groudhog Day, but with superheroes. The Scarlet Speedster is now faced with losing him powers and perhaps even being forced to exit the Justice League.