Only surprise for me would be NaVi beating Gambit.
Let's be honest:
BIG vs TL - TL with standin, we don't know how good BIG is, so anyone winning won't be a surprise
VP - QBF - as trash as VP are, they should beat QBF any day.
Astralis - Mouz - Mouz are playing good, astralist just got device back and a role switch so anyone could win, no surprise here as well
North - Vega - Vega have been playing well but them beating North would be a surprise
SK - SS - don't think SK really care about this major, they haven't even been practicing with felps so it's possible they lose
fnatic - faze - fnatic have been on the rise and faze have been a little underwhelming, 50-50 or 60-40 either side, not a big surprise here
C9 - G2 - C9 played like monsters but G2 are monsters so anyone could win again.
So only thing which would be a real surprise for me would be this trash Navi beating Gambit and Vega beating North.