Ok, I have a ton of projects underway at the moment, all of them I would like to finish at some point. However, I also like contributing to the community, so while it doesn't matter to me which expansion gets finished first, I'd rather go with those that other people might enjoy as well. Here are the current list of expansions I'm working on:
Twilight Omens: This set will work to expand the role of the Silver Twilight Lodge and also make heavy use of Corinthian's Day/Night mechanic. Special events will be linked to the Cross symbol (similar to events in Lost In The Woods being linked to Hexagon) and Twilight Lodge Members will have access to powerful abilities if they choose to invest in them.
Untitled (Deputy): This set expands the role of the Deputy in arkham, with leads and eventually the acquisition of powerful tools to counteract the mythos. There will also be Crimes that occur throughout the city, many mythos related but some totally mundane. These crimes will provide minor obstacles that can accumulate over time if left unchecked. Also, Arrested will be a oft used mechanic.
Untitled (Nyarlathotep): A set dedicated entirely to Nyarlathotep, The Crawling Chaos. There will be 10 brand new Heralds, all related to Nyarly and his avatars, as well as 2 new GOOs similarly linked. Additionally, there will be special Plot of Nyarlathotep cards that enter play very rarely but can have a massive impact. When these cards are first draw, the investigators must decide to negate them (At great cost) or let them enter play permanently.
The Sands Below: A set with a new map that links to the Black Cave, but will also link to other locations in further expansions. It stresses 'quest-like' events that arise which require investigators to traverse the underground desert and complete various tasks. The cost in time is great, but so are the rewards. This set will also feature a decent number of new Exhibit items.
Untitled (Dimensions): This set will focus primarily on otherworlds and include a new map for precisely this purpose. This is the least developed set, so I don't have much else to say about it.
Culdwell Horror: Very close to completion, but I keep putting it off. This is a standalone map that takes place in the small mining community of Culdwell. It is a very claustrophobic, high-stakes kind of game, very cutthroat. Pharol The Black weighs heavily upon the action as a brand new GOO with a twist, as does a rather sadistic new Guardian.
The Besieged Kingdom: A mammoth standalone expansion with a pseudo-medieval fantasy vibe, albeit in a lovecraftian tone. There are three brand new maps, five GOOs, 2 each of Heralds and Guardians and a host of brand new cards in all categories. It basically plays like a totally different game, emphasising character development and exploration (Especially through the other worlds). There are a few main victory conditions, with sealing being toned down heavily in usefulness. I'd say I'm about a third of the way through this beast.
Untitled (Atoll/Ocean): The third standalone expansion, with it's own map set in the ocean. Links several of my own short stories together in a manner similar to the base game, though a bit more focused and cogent. Underwater exploration plays a big role, as do alternate win conditions.
So there you go. I'm going to work on finalizing Lost In The Woods and finish off The Thing (I need to post those heralds...), then I'm going to buckle down on whatever people seem to think sounds cool. Any votes?