Arkane‘s comment pretty much underlines that they have ideas for the future regarding Dishonored or not.
During E3, Dishonored: Death of the Outsider was announced, but it isn’t meant to be the third main installment. Regarding the situation, IGN interviewed Death of the Outsider’s creative director, Harvey Smith.
„All I know is that for this set of characters and this situation that started with the rat plague and went through Corvo and Emily and Daud and Billie and The Outsider, this is the finale of that piece. If there are more Dishonored games, they will be different characters in a different situation.”
Smith – although not directly – confirmed that there will be Dishonored 3. Dishonored: Death of the Outsider is going to launch on September 15 on PlayStation 4, Xbox One, and PC, but as a 30-dollar title, half of a regular AAA game’s price.