Based on what I've seen, these are my obvious/most likely teams to make it to the Grand Finals. Lemme know if you disagree on something, I'd love to here another take.
My top 5 in order from most likely:
GenG
G2
FNC
TH
LEV
Teams not in top 5 that I could see them surprise me and make a decent run:
Talon (Gave LEV a very tough time and have potential. Giving Primmie a bit more time could be just what they need)
FPX (Amazing performance against TH. I'm aware they had unlucky matches during Shanghai and now Champions but it's hard to judge them properly as they've only lost despite strong performances)