Source: The Wrestling Observer
Sting has not yet officially signed a deal with WWE, but it is almost guaranteed that he signs with WWE soon.
Since Sting is not expected to be rushed into a program for WrestleMania XXX, there have reportedly been discussions that he could become the General Manager of WWE RAW. These are just talks right now as this would be a way to keep him on TV and possibly put him in bigger matches down the road for 2014-15.