Detroit is not trading Stanley Johnson, he is looking pretty good for them since Blake's trade.
Detroit hasn't lost since the trade so they're probably happy standing pat with what they have. If there was ever a window to get him it's likely gone now. I knew it was just a matter of time before he blew up. Popovich has been trying to get him for 3 years too and SVG keeps saying no which should tell you something. I can hope though can't I!