Might be an unthinkable scenario now. But in 10/20 years time this could be a reality. If merger is inevitable, then PAP and UMNO will definitely do their homework before this deal goes ahead. UMNO will most likely absorb PAP into their party if that is the case. No point getting together to fight.
The political transition will be like when East and West Germany unified in 1990.
If Malaysia opposition win how?