https://twitter.com/SuzyVLR/status/1663064679252656129?t=-aUXVGzEiu_cOpUthpOgpA&s=19
Okay so to make things simple, the Masters Group Pool are:
Pool 3: NRG, DRX
Pool 4: ASE, FUT
Pool 5: EG, T1
Pool 6: EDG, NAVI
For Tokyo, Riot is indeed adopting the Worlds seeding rules, where each region will only have one representative each in their respective groups, so each group will have:
Americas
EMEA
Pacific
China
And that is final for both groups.
Now, because each Pool has a mirror of itself (AM/PAC and EMEA/CN), we can at least assume there's a 90% chance that:
EDG and FUT will be in the same group
ASE and NAVI will be in the same group
NRG and T1 will be in the same group
EG and DRX will be in the same group
It's just a matter which AM/PAC pair will be placed alongside the EMEA/CN pair.