Except Wales are a decent bet to qualify from one of the next couple if they get a decent group. They finished their last campaign strongly, and sensibly went with youth to give them the experience of a long qualifying campaign. Countries like Croatia, Russia, Uruguay, USA etc... have all come a long way by working hard on their infrastructure and technique at a basic level... but don't worry, there's no need anymore because that place you go through an extra knockout qualifying round to get is now gone. It's been given to a team that doesn't actually exist... oh, and we'll be using your star right-winger. Yeah, the same one who just got injured in our first group game and will miss the next 2 years and never be the same again. Oh, what's that? Your sueing us? Err... who? We don't exist.
How do financial concerns not need to change? Who insures the players against injury? Who pays for everything? Like security etc.
So these nations must firstly scrounge what resources they have (almost certainly below the big nations) to go through an entire qualifying campaign. Which, weirdly enough their star player keeps turning up for only to go home injured because he knows he has a place in the tournament for best of the rest. Then, having paid for the entire qualifying campaign, they are then expected to pay for their own players to go to a major tournament and play for ... err ... I still don't really get this part. Play for basically some kind of charity team? A corporate sponsored national team? Or I think you suggested FIFA chip in or something else ridiculous. Yes, every nation can pay their fees to FIFA so that a squad of 22 players gets to play in the World Cup. You know, because it's not fair if they don't.
In fact, sod having a qualification at all. Let's just let everyone go and play in the finals. We'll call it the Commie World Cup or something. Why even bother having a qualification period that stretches around 2 years? It would probably be fairer to just have a one-off game, drawn from a hat, played over 5 minutes with the team who has the most players called Tim pronounced the winner.
Also, Brazil have very rarely dominated any competition since about 1970 haha Even the one's they've won since have been fairly close-run affairs.
Every single one of your examples from other sports is void by the way. Not one of them compete in the same level of sport. The Lions are probably about as close as you'll get, but even then is something that is routed in history and exists within a sport that barely had more than 6 nations playing it when they first toured.
About as close as you'll get, is some kind of end of season all-star type game like you get in the States for their various major sports. Of course, those are more for show, and it would be difficult fitting it all in.