There's no need to fret. This is the time when projects would be delayed. If the economy were good and nothing were happening, then there would be cause for concern. But Hill International is strong enough to withstand the recession and hold onto the land until the economy improves.
Remember what happened with the Comcast Tower. It was first proposed in 2001 at the beginning of another recession. It took them three years to work out a deal with Comcast after years of arguments about tax incentives and the like. Then it still didn't break ground until 2006 and open until 2008, seven years after it was first proposed! If this breaks ground next year, then that would only be two years after it was proposed, not long for such a large project.
This is a great project in a great location with little controversy. This recession isn't going to last forever, no matter how hard the press tries to prolong it so that they have another "crisis" to talk about. There is no reason this shouldn't happen when the recession finally ends.