The cast also includes Batman veteran Kevin Conroy but not as Batman. In this outing he will be voicing Thomas Wayne. Other cast members include Jeremy Sisto, Jason O'Mara, Stuart Allen, Sean Maher and David McCallum from the Son of Batman animated feature from last year.
So Weird Al is the voice of "The Dollmaker". Is it just me or does DC have an awful lot of villains that deal with toys? Toyman, The Ventriloquist and Baby Doll. Heck! Even Bruce Timm's visual cameo in his show Batman: The Animated Series as The Mad Bomber ended with him screaming:
"My Toys! My Toys! My Beautiful Toys!"
For More Info on the new film: