While Warner Home Video is promoting Batman: Under the Red Hood, out July 27, with interviews and film clips like this one, where Batman and Red Hood argue about tactics:

News has already leaked about the next original direct-to-DVD DC animated film.
Shown here is what the Superman homepage is reporting will be the cover for Superman/Batman: Apocalypse, due out September 28. As expected, Warner is sticking with the big brand-name properties now, focusing on well-known characters. Looks like Darkseid and an evil Supergirl will be involved.
I find myself more interested in the new short cartoons, which explore further into the DC Universe. In this case, Green Arrow gets the spotlight.
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