By virtue of a win over Team WCW and Team Piper at Uncensored 1997, the nWo has the right to challenge for any WCW title at any time.
Strictly speaking, that means they could challenge for the World Title (containing the WCW World Title), the I-C Title (containing the WCW U.S. Title) and the Tag Team Title (containing the WCW Tag Team Title) in the WWF. But of those titles, only WCW's Big Gold Belt remains on TV.
So theoretically speaking, we could expect any of those men to get a shot at the World Heavyweight Title at any time, because they can challenge for any WCW title.
Not that Vince (nor anybody else but me and the guys at DDT Digest) would remember that, though.
I loved the Sting heel turn, for the simple fact that he actually seemed to be enjoying himself a bit for the short time it was going on. That, and anyone who DOESN'T love his "Mistew Hogan, can I have an awtogwaph?" ambush has no soul. (: