As noted, it appears that former WCW and TNA World Heavyweight champion Sting has signed with WWE. In an update from F4WOnline, he has yet to sign a contract with World Wrestling Entertainment. According to sources, WWE sent Sting his contract several days ago, but as of yesterday, he had not returned it.
The belief inside Sting’s camp is that both sides were on terms and an agreement is in place, but as of yesterday, pen to paper on Sting’s side had not been returned to WWE.
However, there is no indication of any serious hold-up, at least from the WWE side. Those in the company even before WrestleMania XXX were working with the impression that he was on board.
Update: Sting has yet to sign with WWE as of today and for those wondering, if he does sign with WWE, which is a good possibility. He will not be wrestling on a regular basis for WWE. We are still waiting on confirmation on if he did or did not sign with World Wrestling Entertainment.