Unfounded rumor or not, I'd say no. Never been a big Irving fan and would rather see what the Kings have in Fox before I'd consider moving him. Sure, the argument will be made that Irving is a sure thing while a rookie that has yet to play a game such as Fox isn't. While certainly true, Irving style of play, attitude and lack of defense doesn't fit with what the Kings have been trying to build lately.
Not only that, the Kings would have to go be up even more than Fox to make a deal work and that's too high a price to pay. While Irving is a very good player, he's not LeBron James or Kawhi Leonard good IMO. Those are players you'd move the farm for.