Well thankfully it is not unprecedented for a Michael Douglas film seeing as Fatal Attraction adjusts to over 700m. This is entirely the reason I think Ant-Man will do the same.
A Wrinkle in Time is getting the fudge (5th biggest PTA in the chart, 10% increase over last Friday despite losing almost half of its theaters) but still gonna be topping out at 96-97m.
If it broke the OW record in local currency in Russia it would be $18m in dollars. Not a tiny sum but pretty insignificant against the enormity of both Chinese and overall OS numbers.
I see Mamma Mia having a slightly better decrease than Sex and the City 2 and Magic Mike XXL had compared to their predecessors. 25/100 or thereabouts.