If I could book it, have have Sting debut the RAW after WM; then have him wrestle again all the top stars, picking up both losses and victories.
Sting vs Cena, Sting vs Orton, Sting vs The Rock, Sting vs Sheamus, Sting vs CM Punk, Sting vs Daniel Bryan, Sting vs Bigshow, Sting vs Barrett, Sting vs Kane, Sting vs Christian, Sting vs The Shield. You get the idea. Have him wrestle as many wrestlers as her can, picking up big PPV victories. Then have him defeat The Undertaker at Survivor Series. Carry on have Sting wrestle big names until Undertaker returns just after the Rumble and challenges Sting to a rematch.
Then at WM you have Undertaker vs Sting II in a no DQ.
That's how I'd book it.