I think this deserves a forum of it's own, honestly. I was surprised that Bethesda actually responded to my emails! That team of developers are my idols! Anyways, to stay on topic, I've been thinking of some ideas for some content, whether it be used in a sequel or DLC.

I thought the rat plague needed a bit of an origin. A conspiracy theory, if you will. I've devised a character/entity that seamlessly lends itself to Dunwall's rat infestation. The Pied Piper. I was taking notes on Dishonored the other day and the Overseer's music boxes gave me inspiration for The Piper's flute. He/she could hail from Nilmah. (Hamlin backwards) I was thinking maybe instead of a flute, a calliope would fit the steam-punk aesthetic and add to the game more than a flute would, unless.... it was carved from whale bone. The Pied Piper could have carved an instrument from whalebone while worshiping the outsider and the entrails from the whales carcass led rats to the Piper, following him/her wherever he/she went, eventually he/she stopped at Dunwall and is the first weeper seen in Dishonored. (The one being thrown into the water by a City Watch Guard)

I also think a new type of enemy/guard class should be introduced. The Tarmen. They are ordered to fill in the hole that is The Flooded District. How? Anton Sokolov developed a device that attaches to a man's backside via hose that pumps liquid tar through a funnel, essentially projecting it where the nozzle is pointed. (Simply put, they shoot tar from hoses, but that doesn't sound impressive) Using the tar to seal off The Flooded District, essentially burying all weepers and inhabitants alive, the Tarmen wear rustic mariner's helmets to shield their faces from stray tar, and are led by The Tarmentor (play on the word "tormentor")

I think these ideas could prove successful in anything related to Dishonored's lore, but your opinion may differ. Tell me what you think. Maybe we can collaborate on some ideas together.