I always go: Best Midfield --> Best Defense --> Best Attack.
If you recall international tournaments throughout the years, the attackers rarely make a difference, particularly in the later rounds where the 1-0 corner kick is commonplace final score. Mbappe was the exception to the rule for the most part. Teams with rock solid spines are the ones that win.
France's midfield is really nice. The defense is more eh. Attackers should be good.
Brazil's midfield I worry about progression. Casemiro and Fabinho are great, but they're not huge advancers of play and I'm not sure the squad has that at all. Not convinced about their defense either, and having 2 world-class goalies is irreverent because you can only play one. For once they finally have a nine though, so who knows, perhaps they'll score consistently.
England are so good on paper it's ridiculous. Their midfield is actually insane with everything you could ever want and depth that is better than most teams. Kane and Sterling have been great for club and country, and I assume Abraham will be coming which means not all is lost if Kane goes down. The defense is a bit more concerning, but usually performs well for the national team. Think Maguire, Pickford, Shaw, etc - all had bad club seasons - all have been rock-solid for England. Potential to whiff there.
Belgium's time has come and gone. All their best players either got worse, got prohibitively older, or are out of form. Courtois and De Bruyne are the major exceptions to that. Defensively they look BAD. Lukaku always seems to come through for the national team, but he and Hazard have been really poor recently. Tielemans is what could make or break this side. I certainly don't consider them favorites.
Croatia I can speak less about, as many of their players play in leagues outside what I consume. I hate the age balance though. A bunch of young 20 year olds and a bunch of ancients. Teams with that makeup historically don't perform well and are considered to be in transition, and I think that fits for Croatia. Generally speaking, players are in their prime at about 27-32. Croatia nearly entirely lacks that age group represented in their squad.
All things considered, I'd still have France as the favorites, like they have been for me in the last couple major tournaments. England wouldn't be far behind. Brazil's squad is so unbalanced I'm not sure how they could break down teams outside of individual brilliance, but if anyone can manifest individual brilliance, it's Brazil. Belgium I'd have a hard time seeing getting anywhere near a semi-final. Their defense is just bad and the attackers have sucked. Croatia I wouldn't be surprised to see not make it out of the group. And as for Canada, a single victory would be a success.
For me It's Brazil their squad is looking its strongest then it has been in the last decade, with two world-class goalies, and a top-class attack. This World Cup is looking like their best chance
For me It's Brazil their squad is looking its strongest then it has been in the last decade, two world class goalies, and a top-class attack this world cup is looking like their best chance