If we check deep facts about all teams and their possible players then surely I am feeling France is moth lethal team in this world cup with have full ability to defend their title because they have too many quality players for all departments and these players are already doing good job in their clubs, and we can call them cream of Europe because of their strong play and quality.
With this comparison there is no competition with Argentina which is mostly depending on Messi and others are also good but have no enough quality like France and this is going to be the biggest difference between these teams here Brazil is also having few good players but comparison they are also not good enough like European teams which are currently good and having better quality for winning.
I agree that France is very strong, but this does not guarantee anything especially at the playoff stage. If you recall the last European Championship, then France was just as strong there as it is now, but in the end they were eliminated at the 1/8 final stage, and it was knocked out by not the strongest Swiss team.
In fact, I would be happy to see in the champions some team that has not yet won this title, but the pool of "traditional" contenders is too strong.
This world cup will be played by really strong countries. We see that Brazil, Argentina, France, Germany, England are all very strong teams. The players are very good. Any team with these players wants to win. It would be a very fun experience for me to win a team that has not won the World Cup before. However, the truth is that these teams are not teams that will leave their job to chance unless there is a big surprise. The winning team will definitely come out of these teams.