Star Wars: The Old Republic. BioWare has gone the distance and begun to put forth an audio timeline leading up to the current peace between the Galatic Republic and Sith Empire.
The historical record will be spoken by Master Gnost-Dural, Keeper of the Jedi Archives, who is in turn voiced by actor Lance Henriksen. BioWare fans will recognize him as the voice of Mass Effect's Admiral Hackett of the Human Systems Alliance. As for how many of these we should plan for, looking at the timeline reveals several more historical points (we counted 18) that took place before this inaugural first.
We'll try to feign a little surprise when "history" from the Knights of the Old Republic RPGs crops up somewhere in here, although hopefully it'll be more than a recap of those game's storylines.