one of my most longstanding interests when it comes to alternate history is a succsessful hundred days. the problem being of course that you couldn't make up a more untenable position for a returning dictator to be in.
so, I've recently hit upon a rather novel idea, What if a different enemy, one more dangerous than an over the hill bonaparte rears its ugly head for britain to deal with, and napoleon is able to reclaim a measure of his former office by siding with his former enemy?
the trouble then is figuring out who might pose a threat great enough that britain would give up its rivalry to put down, and how do you put them in place without changing things so drastically that there is no deposed french emperor trying to make his return.