Seems like if Mitchell were to demand a trade, the most likely landing spot would be Brooklyn. He is partial to NY (grew up in Westchester Co., my old stomping grounds), and among the obvious desirable destinations (Knicks, Heat, Nets), Nets are a combination of best fit and best assets available in a trade.
I agree with Moranis that, if we were to do a trade, I'd much prefer Garland to Mitchell. He would be a much better fit here. It would require some adjustment by Tatum, but frankly would much prefer the offense being initiated by Garland that Tatum. Garland plus Tatum plus Porzingis would be a very good complementary fit, more so than the current 3. I'm still against trading Brown, more for sentimental reasons, but I really like Garland.