We were wrong.
Miller posted a video this week showing off this year's Halloween costume project, and it's a jaw-dropping miniature version of Ecto-1 from Ghostbusters.
As Miller told the Washington Post last year, Jeremy has spina bifida, a disorder affecting the spinal cord, and he uses a wheelchair. Rather than it being a hindrance, the wheelchair is the perfect medium to bring the duo's incredible costume ideas to life. In addition to the snowspeeder and Ecto-1, Jeremy has rocked a pirate ship, Captain America's motorcycle, and the Batmobile.
According to a description of the Ecto-1 costume on Miller's YouTube page:
The Ecto-1 include working headlights, siren lights, tail lights and speakers for Ghostbusters siren and theme music! The roof rack includes yellow canisters, green canister, blue tubes, ladder, red probe, siren light, two speakers (one for the Ghostbusters siren and one for theme music), satelite dish and whatever the white & red canister is from the Ecto-1.We don't know what the pair have in store for Halloween 2017, but we can't wait to find out.