So, there's already a thread (or, at least, there was) about a licensed theme that you want LEGO to do.
This thread is somewhat similar to that, but this time, you can say anything you want LEGO to make. It could be a single minifigure, it could be a licensed theme, it could be a non-licensed theme, just anything.
Anyway, the three I can really think of, right now, would be a minifigure of Edgar Allan Poe, a series of system-style H.P. Lovecraft creatures, and a line of City-kind of stuff, but placed in Europe in the 1800's. So, we'd get vehicles, buildings, and all that jazz. It would be pretty darn cool.
What do you guys want/NEED.