My first idea is to create a multiplayer map that will focus on asset creation and realistic texturing. The look of the environment is more important than the interactivity. It will start off as a small area that can be expanded depending on timescale. I will be building it in UDK and be using 3DS max for modelling the assets, I will also look to sculpt some organic assets using Mudbox and Zbrush. I will also think about the design of the map, spawn points, choke points, vantage points etc. Things that I need to think about are where it will be set and the age, medieval, roman, modern day, fantasy etc.
My second idea is to create a small high detail environment that will solely concentrate on making it look good. This could be a series of small environments depending on the timescale. All the modelling will be done in 3DS max, Zbrush and Mudbox.
My third idea is to create a small level with a high amount of interactivity. This will be produced in UDK with models created in 3DS max but the interactivity is more important. I will be using kismet and matinee sequences to create the interactivity and animations. The setting would be in a modern day house where you would have to search for items, for example find a key to unlock a door.