http://www.pcgamer.com/batman-arkham-knights-launch-appears-to-be-a-disaster/ Edit: apparently the Executive Director of Marketing thing was faked.
This is why I rarely buy action/shooter games any more. Strategy games are built with PC in mind so they actually god damn work. So many of these first person and third person games have frame rate issue, mouse acceleration or some other crap.
This is the first time I've run into noticeable issues with a PC port of an action/shooter game (though to be fair, I don't play Ubisoft games...) For example, with very little tweaking, Metal Gear Rising runs perfectly on my system, far better than it does on PS3. Arkham Asylum and Arkham City also play perfectly on my system, but I heard their PC launches weren't great.