So they just announced that Champions will have 16 teams as usual but since there are only 3 leagues how do we split it?
I think they will put it like this : The top 4 teams from each league : 12
For the rest i can think either that China gets that extra 1 slot OR the region that won the Masters gets them an extra slot for Champions, example:
Let's say that a team from APAC won the Masters, the league APAC is granted extra spot for Champions by making both finalists of the Last Chance Qualifiers gets the slot for Champions, so Americas LCQ sends 1 team, EMEA LCQ sends 1 team, and APAC LCQ sends 2 teams and there you have the 16 teams for it.