The Disney Parks blog actually leaked the news and most of us missed it.
“Speaking of costumes, Duffy will be appearing in his Halloween attire at Mickey’s Not-So-Scary Halloween Partyin Magic Kingdom Park at Walt Disney World Resort starting September 11. You can also find him dressed as a pumpkin at his friendship gazebo in World Showcase at Epcot from October 1-31.”
So, this is confirmation that Duffy can be added to our list of confirmed characters for MNSSHP for 2012
“These items were inspired by the Halloween attire that Duffy wore last year at Disney Parks.”