Just because the currency conversion makes the m3 cost more, doesn't mean it will be in the $90k zone with the M6.
Instead, it will be priced accordingly with the other M models.
Here's a good way to look at the speculated E92 M3 pricing.
Some of BMWUSAs 'starting at' MSRPs:
550i = $58,500
M5 = $82,900
difference of - $24,400
650i = $75,600
M6 = $99,300
difference of - $23,700
650i Convertible = $82,700
M6 Convertible = $105,100
difference of - $22,400
Total average difference of - $24,100
All of these model comparisons were between the top of the line models in their series versus the M model in its series.
335i coupe = $40,800
335i sedan = $38,900
So, based on what the average is, we could safely speculate..
M3 coupe = $64k
M3 sedan = $61k MSRP
For those with hopes of seeing something less pricey I'll say..
M3 coupe = $61-64k
M3 sedan = $58-61k MSRP