Are you crazy? Trading Marion? He is a scorer, he is a defender, he is a leader, he is a hustler, he is stats filler and also NBA's most underrated player.
Marion has missed very few games due injury, Kirilenko missed plenty.
Ok, certenly there is an issue that Marion is making a lot of money (he deserves every penny don't get me wrong). I think eventualy he will be traded, but not for Kirilenko