Bethesda announced at E3 2015 that Dishonored Definitive Edition will be released in Fall 2015.
Dishonored Definitive Edition will be available for the PS4 and Xbox One. Much like other remakes, it will come with all of the previous DLC released already.
Dishonored Definitive Edition will also have improved graphics that will look better than the original game released in 2012. It’s likely to be 1080p and look prettier than before.
Aside from that, Bethesda didn’t announce anything more on the remake. They just said it will be out in Fall 2015. If you missed out on the first game, you can play it later this year for PS4 and Xbox One.
Update: It has now been confirmed that the game will be out August 25th, 2015 in North America and August 28th, 2015 in Europe.