Pinnacle has recently said they won't build if AC rezones the old airport and allows Steve Wynn to build a casino there. Either way, at the moment it looks like AC lost 1 casino, Sands, and is gaining 2. Of course, casino revenues have dropped the last 6 of 7 months so I wouldn't be surprised if plans are dropped. MGM and Foxwoods were going to do a joint casino in AC but dropped the project and are now planning to build in the Poconos.
http://www.vegastripping.com/news/news.php?news_id=1672