How about a board game that combines the politicking and wars between the races at a strategic level. I for one enjoyed the old Component Game System, but it lacked the depth I would want from a B5 game and using the card component often ruined the fun. Now I'm not talking about complicated battle resolution. I'm thinking something more like A Game of Thrones from Fantasy Flight. Something that reflects trade and intrigue as well as war. Preferably with the Shadows, Vorlons and/or the ISA as more abstract forces.