~snip~
It will still be very hot in Qatar, especially as it will almost be winter in Europe by this time. Therefore, it will be harder for European players to adapt than those from Africa or South America. By the way, this is one of the reasons why I think Brazil or Argentina could win the World Cup.
My guess is that Brazil will end up winning this world cup. The weather might help a bit, but they really are great football players, all of them, whoever is playing. It's kinda like second nature for them.
For example Germany can play excellent, but you kinda feel that it was all "studied" and practiced in a way until they perfected it, whereas in Brazil it seems that they are born knowing how to play

Never underestimate Germany football skills. Remember 2014 worldcup semi final where Germany outclassed Brazil by scoring 7 goals while Brazil were able to score only one goal. Germans are even stronger this time and I don't think Brazil are as much strong as they used to be in early 2000s.