Personally, I would like to see the entire course of the Kilrathi war from beginning to end, starting with the Iason incident. The story would open with the image of everything being bright and full of hope as mankind reaches out into the universe, and then suddenly along comes this huge empire that wants to conquer us. We would start with a cast of characters from the older generation--Tolwyn, Paladin, Eisen, etc. back when they were young pilots themselves, then the story would progress through the phases of the war with the younger generation being introduced and climaxing with the end of the war in the fourth or fifth season.
However, if the scope of this is too big, then I would like to either see the the pre-Blair days of the war with Tolwyn, Palidin, Eisen, etc. as young pilots, or else see the series start just before WC2 where the tide of the war is starting to turn against the Confederation and leading up to the end of the war.