Lack of a clear and obvious great national team makes Argentina a very dangerous team. They're collectively really sound, and press and work together as a team with everyone contributing, even Messi lol.
Not saying they'll win the WC, but don't think they should be underestimated either. Although a lot depends on the form of the players coming into the WC. A lot can change between now and first matchday.
France(regressed), Spain, Brazil, Netherlands, Germany, England are all flawed in their own ways. Cannot remember the last time a World Cup was this open.