knowing teams from the same group will not face each other, and assuming pacific kickoff as a precedent for bracket format
Scenario 1 - VIT win playins (Group C #2) (using pacific kickoff):
TH (Group A #1) vs FNC (Group C #1)
NAVI (Group B #1) vs VIT
Scenario 2 - KC win playins (Group A #2):
TH vs NAVI (given that it is unlikely for Group A #1 and Group C #1 are matched up in two out of three scenarios)
FNC vs KC
Scenario 3 - KOI win playins (Group B #2):
NAVI vs FNC (same reasoning as TH vs NAVI for 2nd scenario)
TH vs KOI