Kwiston, can you compare GotG 1 and 2 adjusted for inflation?
Sorry if I annoying in that regard, fogot to ask that earlier
If you just use average ticket price inflation, GotG 1's domestic total adjusts to $356M.
However, ticket inflation is not the best measure in modern years, since 3D surcharge and more expensive IMAX/PLF tickets mess with the totals. We get actual average ticket prices for each year (and they are listed on BOM), but individual films vary. As such, 2D releases with no IMAX probably sold more tickets than suggested by the average ticket price, while 3D blockbusters sell less. Most theatre chains also offer discounts to children, and sometimes to students, so demographics also mess things up a bit. Films that skew younger, sell more tickets than the average ticket price suggests.
The overall average ticket price only raised 28 cents (3.5%) between 2010 and 2014. Then thanks to Star Wars, Jurassic World, Age of Ultron, and a couple others, we saw a 26 cent jump from 2014 to 2015. Last year saw another 22 cent jump on the back of the 300M+ films (plus left over TFA cash). No doubt record IMAX and PLF sales were driving the increase, rather than theatre chains deciding that they needed to bump prices up by 6% in 2 years when the ticket prices had only jumped 3.5% in the previous 4.
Overseas, average ticket prices are more or less stagnant in recent years. Some territories have gone up, while others have stayed constant or decreased a bit thanks to competition between online ticket agencies or theatre chains (such is the case in China I believe).
I don't have access to any data on current exchange rates, but GOTG1 would have made $350M overseas using late February 2017 rates, instead of the $440M it earned using the 2014 rates. I don't believe that today is all that different in most major markets. With inflation, that total is maybe $10M higher.
So to wrap up a long-winded post, GOTG1 would have earned about $685M worldwide with current exchange rates and no ticket price inflation. With average ticket price inflation, you get about $720M, keeping in mind the issues with that conversion.
GOTG2 will earn $360-380M domestic and $460-480M overseas by my best guess. If it falls outside of those ranges, it won't be by much. That gives you a total of $820M on the low end and $860M on the high end.
How much would we expect Wonder Woman to do internationally?
I honestly have no clue.
Man of Steel was $377M ($307M with 2017 ExR), BvS was $543M, and Suicide Squad was $420M (with no China). Given some of the changes in the superhero market since 2013, and current exchange rates I would guess $300-400M. I don't think that it will be as high as Suicide Squad, even with the Chinese release, but I would be surprised if it made less than $300M overseas.