This bit sounds encouraging in that regard:
Tobey, Jake, Natalie and Oscar: O 'Brothers' where art thou? | Notes on a Season | Los Angeles Times
"The end credits song, "Winter" by U2 could figure big time in Oscar, Globe and Critics Choice contests as well. Sheridan, who had previous experience with Bono on "In the Name of the Father" and "In America," says the band really took to the movie and worked on trying to get the song just right for about six months."
Of course, we can't say for sure that this was six months spent before the version we've heard or six months after.