Just guessing based on the info we have atm.
-If they go with 10 teams like iceland:
North America: 2 slots
EMEA: 2 slots
Brazil: 2 slots
Korea: 1 slot
Japan: 1 slot
APAC: 1 slot
Latin America: 1 slot
either KR or BR get 1 or 2 slots since the other regions dont have as much depth of competition (imo) in comparison to them
-If they go with 16 teams like berlin:
North America: 2 slots
EMEA: 4 slots
Brazil: 2 slots
Korea: 2 slots
Japan: 1 slots
APAC: 2 slots
Latin America: 2 slots
for the last they either give it to JP or APAC gets 3. most likely JP for consistency maybe? but idk
this is assuming that since APAC now includes oceania they might want to give them an additional slot and also japan hasnt been performing very well in comparison
PD: no way theyre going with 8 team format since they would unavoidably end with at least 9 teams cuz BR and NA are confirmed to have 2 slots