Ledger's Legacy: A new generation's James Dean?

** FILE ** This image provided by Focus Features shows actor Heath Ledger portraying the character Ennis Del Mar in the movie "Brokeback Mountain." Ledger is an overwhelming favorite to become, on Sunday, only the second actor to win a posthumous Oscar. If he does, the words "Oscar-winning actor" will doubtless precede each mention of his name forever. But beyond that, what will his legacy be? (AP Photo/Focus Features,File) ** NO SALES **