With the number of expansions the main game itself got, I would like to see small box expansions to go along with the board expansions or more themed ones for the main game.

Indeed - Arkham needs a Mountains of Madness expansion - it would sell zillions so I have no idea why they haven't done it.

I could see an Otherworlds expansion possibly as well. Or even just the Dreamlands?

I would love a Mountains of Madness expansion.

Mountains of Madness: http://sendalink.wordpress.com/board-games/arkham-horror/the-antarctic-expedition/ OR http://sendalink.wordpress.com/board-games/arkham-horror/door-to-saturn/

Dreamlands: http://sendalink.wordpress.com/board-games/arkham-horror/the-arkham-nightmare/