I just checked Pollstar's numbers for this tour from last year. It did $153.3M in 106 shows (there were 2 shows missing. One was a part of Radio 1's Big Weekend so it didnt count, but what about the other?)
To be reported in the mid-year update:
-21 dates in Europe (I expect something from $15M to $30M. Yeah, that's a big gap, but it's hard to predict with the negligible info they gave us about this leg)
-12 dates in Asia ($20M+ according to the source in the last page)
So:
153.3M (Last year) + 20M (Asia) + 15M (Europe - low end estimate) = 188.3M
153.3M (Last year) + 20M (Asia) + 30M (Europe - high end estimate) = 203.3M
And there are 7 dates left in Latin America, which includes a stadium date. So 200M is such a safe bet at this point