I really can't see City going for this move, Personally I don't see the point of going for Neves in January on a loan deal for the rest of the season, By the time he gets going the season would be over considering the pile of crap he's playing in over in Saudi.
The Saudi League is absolutely shocking and miles off Premier League standard, I'm sure his fitness levels would be horrendous at this stage, Plus he's fueled by money "not trophies" which is the main concern.
Let him stay were he is, He's bang average anyway and nowhere near good enough to play for City.