People are panicking because there are rumors of 5 slots going to kr orgs but what people forget is these kr orgs can sign players outside of kr still. Their roster just has to be 3/5ths from apac. Do not panic.
Realistically they won't, but it could depends on how much riot intervene these orgs to pick up the teams from regions that left behind like oce id and th
If this is only SEA teams I'm sure they will have mixed countries roster but for KR and Jp I'm not sure about that. In asia languages barrier is more tough than EU.