Hi Katherine and welcome to the Disney Parks Moms Panel.
My family have visited the Walt Disney World Resort many times during the Fall and one of our favourite things to do during trips at this time of year is to attend
Mickey's Not-So-Scary Halloween Party.
I do not recall any Halloween themed meals being offered during previous years but think that it would be a really great idea.
The only Dining Event which I can think of that may be of interest to you is
Club Villain at Disney's Hollywood Studios - a frightfully fun dance-and-dine event featuring some famous fiends! (Although Disney Dining Plan entitlements may not be redeemed for this event.)
Tickets to Club Villain can be purchased for $129 per person, tax and gratuity included. Reservations are recommended and can be made up to 90 days in advance, either by booking online or by calling (407) 939-3463. (Please note that at this moment in time, reservations can only be made online for dates up to and including May 28, 2016.)
Do you currently subscribe to the Disney Parks Blog? If not, I would highly recommend that you do so as this is the place where announcements about any new Halloween offerings are most likely to be made.
Wishing you a magical trip filled with memories which will last a lifetime!
Emma