From the NY Times:
...it is unclear whether Mr. Ratner will be able to meet his own deadline to start one of the most ambitious projects in Brooklyn in decades, given the softening economy, the crisis in the debt markets, rising costs and a persistent group of opponents who have filed one lawsuit after another.
From Develop Don't Destroy Brooklyn:
The Atlantic Yards project is hanging by a thread, yet Ratner continues to demolish a whole section of Prospect Heights and spend taxpayer dollars on project-specific infrastructure work. It's time for that to stop.
And Congress is looking into the AY project as well as the Citifield and Yankee Stadium deals.