I think 1st tier will be about 8 teams.
South Africa
India
Australia
England
Pakistan
Srilanka
West Indies
New Zealand
And 2nd tier will be:
Bangladesh
Zimbabwe
Ireland
Afghanistan
Scotland (Maybe)
Kenya (maybe)
The top team of 2nd tier may replace the bottom team of 1st tier every 2 years or so. Poor West Indies and NZ will be under threat if this happens.
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