Just a couple of ideas to date, concentrating more on monsters and followers at the moment. Here they are...
"Moonless Night" During your travels through the night you stray off course,go back to your previous position and continue to move in the other direction.
"Card Sharps" Place this card on the Tavern Space. A group of card cheats spend countless nights taking money from all comers. You may not win any gold whilst these cheats are at the tavern! If the gambler is your follower you may not collect 1 G and must lose 3g.
"The Howling" (Event) The night is spent in terror of surrounding packs of wild beasts. One of your followers flee in terror.
"The Hunt" (Event) The ghostly hunt is upon you and must flee four spaces anti clockwise in order to escape its deathly clutches.
"Lepers" (Event) A procession of the unclean pass you by. Roll a die for each follower, on a roll of 1 discard that follower after your next turn as they fall ill.
"Dusk" (Event) Night has not quite fallen. You may draw a card either from the adventure deck or the night fall deck (card idea by dth)
"Bat Swarm".(Event) You disturb a colony of sleeping bats, roll 1 die for each follower on a 1 they flee in terror to the discard pile. The princess will always flee
"Foul Plague" (Event) A foul plague sweeps the land. All strangers,enemy monsters and creatures on the board including characters and their followers must roll a die. On a roll of 1 or 6 they are removed to the discard pile, characters affected must lose 1 life.
One thing I wanted to do is do some cards for the corner spaces and other set spaces which adjust the conditions outlined on the board, as you can see with the card sharps card up there for the tavern.