Too busy wrestling in front of 1000 people and no touring schedule.
and getting paid more then the rest of the TNA roster combined.
It would be great if Sting went to WWE for a run for a few months but I just dont see it ever happening at this point.
He seems comfortable being the big fish in a tiny pond. they pay is ok and he doesnt have to work all that much, 3 maybe 4 days per month if he is on a PPV.
He can get what he wants now by just telling dixie that wwe called him and he doesn't have to fly all over the place every week.
If he went to the E he would have to prove himself to a whole new audience who dont have a clue who sting is and what WCW was, he would have to wrestle more then once every 2 months and he isn't HHH's buddy so they cant just have him on TV for the lulz.
Plus I think the market for Sting merch dried up 13 years ago so what would WWE have to gain out of it?
There is no one on the roster who it makes sence for Sting to feud with ether since all the WWE friendly people from his era have ether retired/died or are in TNA and they have already had matches ia few times.
Would be cool to have him in WWE video games though....