There aren't Halloween events per se at DL other than Mickey's Halloween Treat, which was more of a trick or treating event over at DCA. It did sell out quickly this year and I guess was a pretty big hit (I didn't attend), so I would guess they'd be doing it again next year. In the past there has been a special event associated with the HMH opening, but they didn't do it this year. We don't even know if HM will be getting the overlay next year.