I think it must be the last chance for Messi to win the WC for his country.To that extent the legend has been an underachiever.It looks more to do with combining or gelling with team mates than raw talent which he has in abundance.I think he has to think over it seriously.In addition, to his bad luck his group have some unpredictable if not great teams like Iceland and Nigeria.Fickleness and unpredictability is always dangerous and he can only hope even if the team doesn't win the WC at least they return home honorably.