As the seeding is higher for the teams who qualified for the champs( for example, KRU finished 10th in the league stage but qualified for the champs but was the first Americas team to get eliminated in the champs, so they'll be given the 4th seed most likely), and the remaining seeding is most probably based on play-offs first, then league play, the most likely groups and match-ups are:
for pacific: Group A: DRX, T1, Zeta, and GenG
Group B: TS, RRQ, GES, and Talon
Group C: DFM, Bleed, PRX
Group-stage matchups are:
DRX vs. T1, Zeta vs. GenG
TS vs. RRQ, GES vs. Talon
DFm vs. BLEED, PRX vs. TBD
For Americas:
Group A: LOUD, NRG, KRU, C9
Group B: LEV, FUR, SEN, 100T
Group C: MIBR, G2, EG
Group Stage match-ups:
LOUD vs. NRG, KRU vs. C9
LEV vs. FUR, SEN vs. 100T
MIBR vs. G2, EG vs. TBD
For EMEA
Group A: FUT, GIANTS, NAVI, and Liquid
Group B: VIT, BBL, Heretics, and KOI
Group C: KC, Gentlemen, FNC
Group stage match-ups are:
FUT vs. Giants, NAVI vs. Liquid
VIT vs. BBL, Heretics vs. KOI
KC vs. Gentle mates, FNC vs. TBD