I am really digging all of these ideas! Sadly, Hasbro loves to rehash it's figures and their Star Wars Battle Packs are a great outlet for them doing so. For every one, new, figure in a Battle PAck, there are four repacks or repaints. Still it is a great way to get larger items that can't be packed in with the figures.
They have done BPs w/speederbikes for Star Wars, how about the motorcycle chase from TLC with Indy, Henry Sr., a German soldier, and two motorcycles...maybe throw in a guardhouse like the LEGO set.