New Orleans also could have drafted him. Obviously, you can build a perfect roster for any team out of guys they didn't draft. But it's painful to think about what this team could have been if they'd drafted Garland and Bane, kept Ball, and traded Holiday for Turner* instead of the bullshit they ended up getting. I don't think Zion would be sitting out if that's what happened.
*Holiday's brothers played on Indy, and Turner was offered for Hayward not that much later, so that's not at all implausible.