- Mental Magma is holding a contest to pick the celebrity who is most obviously not Batman.
- Bam! Kapow! writes a letter urging Christopher Nolan to pick Black Mask as the next villain.
- TV Catwoman Julie Newmar says Angelina Jolie should be Selina Kyle.
- Movie Blaze has a very detailed plan for the next movie and its villain.
- Comic Book Resources has a trailer for Batman: The Brave and The Bold which, though the total opposite of The Dark Knight in tone and aimed for kids, still looks completely awesome.
And some other places around the web have offered up their own speculation on the next Batman villain: here, here, and here.