Last chance to look away.
Since then the list of achievements has been revealed, and as well as a lit of general ones, there's a bunch for the story that contain some pretty big spoilers.
As general achievements go, you'll be rewarded for stealth, theft, and murder, as well as playing through without getting spotted or killing anyone. The only achievements tied to the two characters are awarded for finishing the game with them.
Storywise, there are quite a few spoilers, inclduing a rather interesting one referencing Delilah.
Delilah is able to use paintings to steal a person's spirit. The Spirit Thief achievement is awarded for taking Delilah's soul.
The character's name has already been spotted on the propaganda poster that comes with the collector's edition, but as the "new" Empress Delilah Kaldwin. So she's definitely back and it'll be our job to finally get rid of her presumably.
You can peruse the rest of the story achievements for more spoilers if you like, but that's quite enough for me.
Dishonored 2 will release worldwide on November 11 for PC, PS4 and Xbox One.