Wigan Athletic spent the first four of the nine seasons in the Premier League, 2009/10 to 2012/13, and the last five outside it. Against City they played eight league games, lost seven and drew one: 1–1 at home in October 2009. One point. Take City out and it comes off. Nothing else does.
So the rebuild moves Wigan by City’s place and little more. Sixteenth becomes 15th in 2009/10 and again in 2010/11, the free place, the one every club below City gets. Only in 2011/12 do they climb further: 15th to 13th on the same 43 points.
That season Manchester United lost 1–0 at Wigan, then drew 4–4 with Everton, and on 30 April City went top on goal difference. Take City out and United still lose at Wigan, and it no longer matters: nobody is close enough to punish it. United top the rebuilt table anyway.