1) Open Club Crypt
2) Bring back a new Deadwood with new shops and new levels and stuff.
3) Make pumpkin pets that can be placed in your house and give them corresponding pet emotes like the Snow Monkey emotes, but make them purchasable. It could be sold in Crypt and emotes like a happy, sad, surprised, scared, or angry pumpkin emotes could be sold. Remember at the Japanese Nexus when they had a Snow Monkey in the water that would randomly make some kind of emote? You could the same thing for the pumpkin pet but the different emotes would appear once a time at random times. You would have to wait for a specific emote to appear in order to buy it, and some could be rarer than other. For example, in order to buy the sad pumpkin emote, you'd have to wait for the pumpkin pet to make a sad face, but you wouldn't know when it would happen because it'd be random, so you would have to wait for it to happen. Similar to how beanies were sold during the winter.
4) If you bring back trick or treating (which I highly suggest you don't): Make the ghost candies private spawn so that way we don't have 1,000 people going after the same ghost and then people raging when they don't get the candy and saying bad stuff to other people.
5) I suggested this to an admin but make a new furniture item. It'd be a normal portrait or something but everytime you move the eyes follow you. Idk how'd this work.
6) A costume contest similar to the Valentine's day thing. People pair up and try to make a scary Halloween duo for a special Haloween hat. Or you can make it individual and person with most creative costume wins or whatever.
7) Hats I guess but make them creative and cool hats. I don't have any ideas though because I'm not creative or cool.
8)EMOTES