I was flipping through the channels last night and stopped on Fox Sports Southwest and they were doing one of their highlight shows. The guy on there said that they are looking into moving the Saints/Cowboys game to Sunday Night Football and that they'll keey us posted.
Coincedentally in this week's issue of TV guide they had a NFL mid-season review article and in one of the sidebars they listed the games they would like to see moved to Sunday night and the Saints/Cowboys game was one of them. They said because it would be the old "America's Team" against the new "America's Team". Plus I guess you also have to figure in the whole "Teacher vs. Student" angle with Parcells vs. Payton.
Actually it will be a game that can grab the highest ratings. More than likely that will be a game with playoff implications but I can see them putting the Saints on just because they seem to be a good draw for TV audiences this year.
I think SNF prefers Divisional rivalry games where they can get them, and NFC vs. AFC games haven't been all that competitive in recent seasons-- also don't forget Fox and CBS can protect limited amount of games against being moved.