Don't understand people saying hes a waste of money when he would be paid so much in WWE to do less
Difference is he would generate way more than what he makes and be useful to the talent.
WWE would sell merch, use that video library for a definitive collection, put him in a WM story arc, call him a hall of famer, and introduce Sting to tons of little kids in their magazines and toys. It would be a two sided deal, hell 3 sided as fans could get something from it new and old.
And as far as talent goes, wwe would never let him kill their names. They didn't do it for Goldberg or Steiner. They would never let him squash a triple h, taker, Cena, Orton, and no sell their stuff. TNA on the other hand did it dating back to Nashville on Wednesdays where he came in and wrecked shit that got in his way from day one. He gave AJ and Joe some rub, maybe you can argue Abyss, but it didn't elevate them at all as they are still that hamster running on that wheel. If TNA had the sense to use him like WWE did Foley in the early 00's then yeah he could help but they don't.