Here's something I wrote on the 5D Mark IV price the other day...
On the day the 5D Mark III was announced (March 2nd, 2012) the USD price was $3500. That converts to 286319 Japanese Yen (JPY).
If the 5D Mark IV is also announced at $3500 USD, that would convert, based on the exchange rate today, August 19th, 2016, to 350682 JPY.
The percent increase in price in the US for the 5D Mark IV over the 5D Mark III would be 22+%. However, if the 5D Mark IV is announced at the same JPY (286319) then the USD price would be $2857. So, anything above $2857 would be a price hike for the 5D Mark IV (assuming the exchange rate on announcement day is the same as it is today, August 19th, 2016).
Some companies price their successor wares lower, the same, or higher, depending on a variety of factors. Obviously, the 5D Mark IV is a more capable camera (based on the rumored, but presumed to be factual specs) than the 5D Mark III, but really we also have to consider it's capabilities vs the similarly priced competitors in the market vs what the 5D Mark III was up against. Given that criteria, I'm curious to know how people feel the camera should be priced, and why.
Based on current exchange rates, I feel it should probably be priced at $2999. This represents an increase of 5% from the Mark III to the Mark IV on launch day based on current exchange rates. Psychologically it also doesn't exceed the $3k barrier and for people who are clueless about exchange rates, it represents a decrease in the cost of the successor model of $500, launch vs launch (which coincidentally, is the same total dollar difference from launch vs launch of the 1DX and 1DX Mark II) if you don't factor in exchange rates.
Personally, I think the people (who frankly, seem appreciative) guessing $3500 are... well... a little nuts, to be honest. I think that's absurd, given current exchange rates. But hey, if enough of you folks celebrate a price tag of $3500, I'm sure Canon USA will be MORE than happy to oblige.