Nelson's house (run down dump of a house) with the associated Nelson character.
Martin Character with quests for Nelson to torment him and Milhouse (Wedges and what not)
Smithers (probally another buy with Donuts character)
The Jebidah Springfield statue
Some sort of involvement of the Aliens (Chronos and whatever the other ones name is)
Some sort of involvement of Sideshow Bob
(Although i dont think the last two should be characters per say.. they dont seem the helpful types)
OH, you should totally do some sort of Halloween promotion or event which gives you the aliens.. that would be epic.
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