The way that teams are valuing 1st round picks these days, I doubt you could get a 1st round for Mills especially with how deep the position is. I'm assuming that st round picks will develop similarly in 2k to 1st round picks in the NBA. I also don't see why San Antonio would trade Mills given where they're at, how valuable he is and that Cory Joseph doesn't do the same things that Mills does.
For the Hornets, I don't get why you would do that. Gerald Henderson and Mayo are comparable, Gary Neal is the best shooter in the deal and Cody Zeller is a young big.