Dean Winchester is a supervillain.

[hermione_vader]

...That sounds like a crack!fic.  That I would probably read.

Actually, I just got bored and looked up Batman: Under the Red Hood.  Jensen Ackles voiced a shiny new villain called the Red Hood who is actually Jason Todd, the second Robin, after a bunch of shit happened to him.  Jensen actually did a pretty good job with the voice, I think.  In the second half, he got some standard supervillain/Well-Intentioned Extremist dialogue, but his delivery was quite convincing despite that.  I think he did better than Neil Patrick Harris, who was Nightwing, and who I kept expecting to say, "Holy calculated stunt casting, Batman!"

I have Opinions:

• Bruce Greenwood's Batman was decent, but rather standard.  Then again, I always feel like there's really only so much one can do with Batman---there's not a lot of room to play around with him like there is with other oft-adapted characters Sherlock Holmes James Bond The Doctor.  Still, I liked him.  Yes, Kevin Conroy is my Batman, but Greenwood did a fine job.
• While watching this, I realized how much of a Christian-Bale's-Batman impression Jensen does on SPN because his voice was so clear here, and it was pretty refreshing to listen to.
• I was surprised that Nightwing did not feature more prominently in the plot.  He showed up, fought alongside Batman, got injured, and then limped home (though he appeared briefly at the end).  I was hoping that Batman would have to face Jason with Dick at his side, thereby directly comparing the two Robins.  There were small mentions in that direction, but not the big motif that I was looking for.
• The Joker's voice was way too low, and I hated him at first, but near the end, I really started to love him.  I didn't like him at first because he wasn't Mark Hamill, which is a sacrilege to any kid who grew up watching Batman: The Animated Series in any capacity.  Then I remembered that Ledger's live-action Joker's voice got lower at certain points, like during the interrogation scene, so it was okay.  Also, he had some hilarious (and wonderfully IC) quips during the climax.  I still prefer a high-pitched Joker voice, though.
• Jason Isaac's Ra's Al Ghul was superb.  He only appeared for a little bit at the beginning at first, which made it seem like this film would fall into the "Let's Get Jason Isaacs and Use Him for Less than Ten Minutes" trend that the Harry Potter films started.  But then Ra's appeared again about 2/3rds of the way through, mostly to give exposition, but he gave an explanation for that, and it really helped characterize him as an honorable villain with really interesting morals (for instance, violence is only okay when it has a clear purpose).  Ra's was probably one of the stand-out moments for me.
• The scene where the Red Hood makes his deal with Gotham's major drug dealers reminded me of the Joker's meeting with the mob in The Dark Knight.  Just sayin'.
• Overall, I thought the animation was quite good---definitely a nice throwback to B:TAS.  It definitely had that great, stylistic darkness to it that I love (minus the constant red skyline).
• The Riddler had a brief cameo in a flashback, and it made me go: "Aw, poor Riddler!  HE GETS NO LOVE!!!"  You can see where my priorities are.
• I liked that they named dropped a few villains ('Scarecrow...Dent") to keep continuity.
• Ickle!Jason = Obnoxiously CUTE!  Which makes the whole thing that much more tragic. ;______;

While this does have some flaws and a bit of a conventional plot, I definitely recommend this film for people who loved Batman: The Animated Series (Bruce Timm produced this, after all) and want a similarly gritty animated Batman story that is a nice break from the Adam-West-throwback that is The Brave and the Bold.