This is a great idea! How about a "you were the sole survivor of a battle" start. More or less you start in a field surrounded by your dead comrades and enemies (let's say daedra).
Just throwin one out there.
Not sure lone survivor would work out all that well since there isn't much of a justification prior to the main quest for there to even be a battle of that magnitude. Besides, there's engine limitations on the number of corpses you could spread around on such a battlefield.
Does it need to be set around a
large battle? TES IV already scales everything down, so scale the battle site down too!
You could begin as a member of the Blades, sole survivor of a party of six or seven Blades in a recent battle against trolls or ogres etc. You'd begin with Blades equipment and could be placed pretty much anywhere as a starting location.
Or maybe again as a member of the Blades, just survived a battle with a group of Mythic Dawn agents, and you found plans detailing the assassination of the emperor, and must race back to the Imperial City before it's too late (...it is). You'd begin somewhere nearish to Lake Arrius.
Or you could be a lowly Kvatch soldier, who survived the beginning of the siege of Kvatch, and is sent by Savlian Matius to inform the emperor of the fall of Kvatch. You'd begin with Kvatch guard uniform and the standard equipment held by any Kvatch guard, and you'd get a quest to head to the Elder Council to tell the emperor.
Or just some random adventurer from a party which got wiped out in a cave.