The hyena-headed pic was not a mistake, just Demogorgon experimenting with his "Polymorph Specific Body-Part" spell when one of the abyssmal paparazzi snapped a photo and sent it to Paizo.
It's hell being a Demon Prince, everyone wanting a piece of your time or your realm...swarms of quasits just hanging around outside your palace waiting snap those embarassing pics...cut the guy some slack! ;)
I intend on using this as the springboard into RHoD. The plans will detail increased hobgoblin activity in the area and the PCs (as part of a larger military campaign) will be sent in to investigate since they are the closest agents in the area.
Anyway, I've gotta say that after I started rolling my dice in front of the player's (hit and damage) they started using better tactics, when a couple of them died. They have found out that monsters/villians have Intelligence scores as well, and I'm not afraid of using them!
The only dice I roll behind the screen are random encounters and skill checks for the bad guys or NPCs.