Hello i've made my math and if i'm not mistaken on something this is every possible group for champions groupstage considering seeding, rules, and possible draws.
GROUP 1 (EMEA HEAD)
V1: TL - G2/NRG (Loser) - EDG - DRX
V2: TL- G2/NRG (Loser) - T1 - XLG
V3: TL - DRG - SEN - DRX
V4: TL - DRG - T1 - MIBR
V5: TL - RRQ - SEN - XLG
V6: TL - RRQ - EDG - MIBR
GROUP 2 (AMER HEAD):
V1: G2/NRG (Winner) - DRG - FNC - DRX
V2: G2/NRG (Winner) - DRG - T1 - TH
V3: G2/NRG (Winner) - GX - EDG - DRX
V4: G2/NRG (Winner) - GX- T1 - XLG
V5: G2/NRG (Winner) - RRQ - EDG - TH
V6: G2/NRG (Winner) - RRQ - FNC - XLG
GROUP 3 (APAC HEAD):
V1: PRX - G2/NRG (Loser) - EDG - TH
V2: PRX - G2/NRG (Loser) - FNC - XLG
V3: PRX - DRG - SEN - TH
V4: PRX - DRG - FNC - MIBR
V5: PRX - GX - SEN - XLG
V6: PRX - GX - EDG - MIBR
GROUP 4 (CHINA HEAD):
V1: BLG - G2/NRG (Loser) - FNC - DRX
V2: BLG - G2/NRG (Loser) - T1 - TH
V3: BLG - GX - T1 - MIBR
V4: BLG - GX - SEN - DRX
V5: BLG - RRQ - FNC - MIBR
V6: BLG - RRQ - SEN - TH