[quote=Jannah]
Maybe a scenario where some deranged person goes back and attempts to talk the Nazis out of invading Russia? I think that's pretty important since if it wasn't for the invasion of Russia there's a good chance Germany could have won. Or if we want to go further back I'd love to do something in the medieval period, perhaps the Crusades era.
[/quote]

Actually speaking of crusades, maybe someone could have gone back and try to uncover the Templar treasure that they tried to hide from King Philip. According to legend it was later lost but if somebody managed to steal it before it was lost then that person would be a rich bugger.