We are talking about football so everything is possible, there is a chance for even good teams like Germany or England to lose the game against a weak team and if they let more nations enter the world cup there is a higher possibility to see this happening for many great teams when they fail to even pass the staging group but usually, the reason of they lose these game is the defensive playing style of the weak team lowering the speed of the game which can be a reason to lower the quality of the games in the world cup.
Absolutely. Just look at what happened in the previous world cup:
Italy, a previous champion, didn't manage to qualify.
The current champion, Argentina, lost against Saudi Arabia.
There are always surprises in the world cup, I'm just a bit worried that having so many teams will make the world cup a bit different, as the initial stages will almost look like the qualifiers.
For example, in South America there are 10 teams in the qualifiers. Currently there are 4 direct spots and one that goes to playoffs against Asia.
In the new version, there will be 6.5 slots. That means that in theory there might be up to 7 of those 10 teams in the world cup. So, basically almost the same as the qualifiers.
Messi winning the world for his country Argentina was a great achievement that is making most of his fans to think that Messi is far better then Ronaldo. Although Messi and Ronaldo may not be participating in the upcoming world cup competition.