I admit I miscalculated a little... and perhaps was less familiar with sales data than I should have been. Now that I know better, and have studied sources like Famitsu, VG Charts, and NPD... as well as population growth rebuttals against Malthus's Essay on the Principals of Population, Adam Smith's Wealth of Nations, Karl Marx's Das Kapital, and the Drake equation... I'm revising my Breath of the Wild sales prediction to 100 billion units.
Only 100 billion, you need to stop being so pessimistic, googol is the absolute floor for a title like this. You've completely underestimated the galactic and interdimensional market. Honestly can't see it selling and less than infinity at this point.