I don't think it benefits the Ducks enough to get the deal done. Since Getzlaf is the major player in this trade Chicago sadly has to match his talent level or overpay in prospects. Plus he has always had a good relationships with the Ducks and fan base. So the Ducks are less likely to trade since he is regarded as one of our best players.
Ducks say no. First, the Ducks are weakest down the middle, so trading a center, especially their first line center and one of their best players, makes no sense. Second, Anaheim seems to want to compete and is not rebuilding. They won't trade their first line center for a good young puck-mover (already have Fowler anyway) and a really good prospect. That creates an even bigger hole at center and literally sends the message that the team doesn't want to be competitive this year. Saku Koivu would be their best center. Like I said, the center depth would be atrocious, and I love Koivu, but he's not Koivu of years past.
We don't need Getzlaf anyway. Sure, he's a great player and would be a great one two with Toews, but he'd command a TON of money to re-sign and Chicago simply couldn't afford to do that.
Value's not good for the Ducks and they have no reason to do it. The Hawks should target someone cheaper than Getzlaf, so they stay away too.