The Cubs hold a slim one-game lead in the chase for the final NL wild card spot, just above the Marlins, who hold their head-to-head tiebreaker. The Cubs are also currently half a game behind Arizona, who also hold the tiebreaker. And somehow the Brewers still have not clinched the division, although it would be quite funny if the Cubs ran the table and the Brewers collapsed, unlikely as it may be.
If we assume the division is lost, based on the extreme unlikelihood that the Brewers lose every game and the Cubs sweep x2, then the most realistic finish is with the second or third NL wild card.