Hmmm. I'm not so sure about this one. John C. Reilly's a funny guy and Jack White as Elvis is a freaking genius move, but the main idea - basically making a spoof of Walk the Line - just feels a little... obvious, I guess? I was hoping for something a little more like a Ron Burgundy or Ricky Bobby, more of a pastiche of the glut of musician biographies over the past few years than a direct rip-off.
I'm also not sure how I feel about Judd Apatow. I loved Freaks & Geeks but I think he's a little too... gross for me. I watched the red band Superbad trailer and it made me feel dirty. I know he's the hot new guy these days for making gross-out comedies with heart, but I can really take him or leave him.
The real draw here for me is Jake Kasdan, whose Zero Effect is one of the overlooked detective movies in the genre, right next to Robert Altman's the Long Goodbye with Elliott Gould as a slouching, slacker-esque Philip Marlowe. Throw 'em in the queue. They're worth it.
The prognosis: I'd Rent It, but I'll read some reviews first.