The Undertaker would be Sting in a Wrestlemania match; more like a dream match of course. Both man can never equally match in many reasons Sting is not a serious threat to the streak. Both men worked for different companies and were good during there times. If a match happens at Wrestlemania; I believe it would be "Once In A Lifetime." How current WWE product is and if Sting return (not possible) they would see how much money they would make. WWE would overplay the match which would give it a bad experience.