My bet is also between Brazil and Argentina.
I believe that Brazil has a better chance of winning the world cup, because even without a team of great stars (let's face it, Neymar is not doing so well), it's a young team that has actually played very well (undefeated). in all the qualifiers and friendlies in which he participated.
In any case, I see that France is also a team with a lot of potential to reach the final.... let's watch carefully.
@alegotardo Brazil has many important player’s like Casemiro, Anthony, Fred and currently they’re all playing for the same club which will further strengthen their bond heading in to the World Cup. Furthermore while Messi will want to win it and retire in style, but I personally feel that Argentina will just fall short and miss winning it and I’ll say it again that if Brazil fails to win then it’ll be really disappointing for millions of fan's who’re sincerely hoping that they win the World Cup.