Well, I had some ideas revolving around the halloween event on moronyard.
1. Being, Special Haunted Chests, along with very rare Haunted hats and misc's (I could work up some hats as well)
2. Being, Special Halloween Unusual effects (The new ones in tf2's update) only available in the Haunted Chests (If they're to be added)
3. Being halloween gifts that spawn on the 3 servers, which will of course drop Halloween items, like "Haunted Chest Fragments" and rarely a normal Haunted hat, as well as Haunted Chests and Haunted Keys/Key Fragments.
4. Being, Halloween hats, Haunted Legendary Hats, and Legendary Hats.
Please note these are just my ideas, Leave a comment below on whacha think about them.