I’d go with these predictions:
Saturday:
Germany over Sweden
Cameroon over China
Sunday:
Brazil over Australia
France over Korea
Canada over Switzerland
Monday:
England over Norway
USA over Colombia
Tuesday:
Japan over Netherlands.
So, with all due respect to all of the teams, a round of 16 is good in providing more matches to watch, a whole 4 days but it looks like it will be the quarterfinals where things really get interesting.
Still, a 4 round knockout tournament after the group stage, should be exciting and maybe we will see upsets.