Realistically he has no chance of CL or World Cup because of the teams he's playing with. Suarez playing like a donkey doesn't help either and Neymar is gone.
I'd say CL is more likely because the competition isn't as strong this year with the best teams, although Barca will never match Real for sheer luck.
I wouldn't say Argentina are any better than Nigeria or Croatia and Iceland will frustrate them. Nigeria thrashed them the other week. Spain, Germany, Brazil, France have produced far better players over the last 5 or 6 years, while Argentina are still dependent on the likes of Messi and Mascherano and have produced nothing for years.