Here's some info straight from Raven/LucasArts/Activision about the upcoming Jedi Academy game.

Lightsaber – The player will start with a lightsaber he creates choosing from different hilts and blade colors. The player will be able to use the lightsaber for the entire game, eventually earning the right to wield a saber staff, or one lightsaber in each hand. A full range weapons and Force Powers is also available to the player, as in Jedi Outcast.

Player Character – As the player, you get to create a custom Jedi character to play through the game with, choosing from hundreds of potential combinations. As a student at the Jedi Academy, you will train under Luke Skywalker and Kyle Katarn.

Timeline – The game takes place one year after the events of Jedi Outcast; fourteen years after A New Hope.

Game Engine – Jedi Academy uses a heavily modified version of id Software’s Quake III: Team Arena engine. New features added since Jedi Outcast are:

• Character customization system - allows players to create their own Jedi in both SP and MP (estimating 2160 combinations currently)
• Ghoul II enhancements including the Ghoul infinite Model modification system - Allows for modular model enhancements, custom colorization, and expanded animation support
• New ICARUS II scripting system for Single player and Multiplayer. Now allows for scripted events in multiplayer matches.
• New map creation tools allowing for models to be used as in world objects instead of just textures. Creates richer 3-D environments.
• New non-linear mission progression system.
• Raven’s ARIOCHE terrain system.
• Portal skies
• Rag doll skeletal system
• Enhanced vehicle system. Allows for new ride-able vehicles in addition to previous drive-able ones
• Character and vehicle enhancements designed to enable expanded mod support. Modders will be able to design their own Jedi, character outfits, sabers, etc.