Some very interesting math indeed...
But u dont need that formula to see how GoTG is doing 650 mil WW.
Its a nobrainer at this point.
its tracking for a 73 mil OP.W. in the US
thats a 200+ mil guarentee based on the reviews. and it can easily do 225 mil or even more close to CAP2 TWS numbers. no surprise here.
as far as OS is concerned again its no surprise these kind of movies do well and with the ever expanding China numbers every movie released has a better potential for more grosses.
The Wolverine did 282 mil OS. 300+ is a LOCK for Guardians. Its not getting lower than 300. A nobrainer.
How much it will do OS ? probably the same as CAP2 TWS or Thor 2 TDW did. over 400 mil.
Yes the GA doesnt know all the details but they arent dumb. they know the connection between The Avengers and all of the Marvel Studios CMU.
200mil DOM & 400 mil OS is a safe bet. a nobrainer really. And these are modest predictions. 600 mil WW is guarenteed. We can easily assume a 600-700 mil gross.
And few will be surprised if it does more.
Eh. While I mostly agree with your conclusion, the problem I have is that you're getting there by cherry picking numbers. The TDW did the best international box office, relative to its domestic box office, of any non-X-men MCU movie, ever. And only DoFP narrowly edged it. And TDW is a sequel, and this is a space in which sequels have arguably outperformed their originals. Assuming GotG does as well as TDW OS off its domestic take is a very optimistic scenario, not a conservative one.
If GotG puts up numbers somewhere between the first movie in both those series, Thor and CAFA (instead of their follow-ups), we're looking at around $400M global BO and a lot of sadness. CATWS made more in just overseas revenue (and it was actually pretty weak overseas relative to domestic) than Thor or CAFA made in total global BO.
I think GotG is likely to have a much lower opening day BO than TDW or CATWS (TDW was $85M, CATWS was $95M, and I expect GotG to come in at more like $75M), but it has an advantage over each of them which, I think, will result in the 3 movies ending up with vaguely similar global BOs (though taking 3 different paths to get there).
In the case of TDW, GotG has substantially better reviews which should translate into much better legs. TDW had a really strong opening weekend, but deeply mediocre legs thanks, I suspect, to mediocre reviews. However, it then did a fantastic job of translating that into OS BO. I think GotG will end up with comparable or probably better domestic revenue to TDW despite a weaker opening weekend thanks to the reviews.
CATWS, on the other hand, had a great opening weekend and solid domestic legs (thanks in part to very strong reviews), but it did a terrible job of translating its domestic performance into OS performance. CATFA was also really bad at that, btw, and was the single worst at it of everything released from 2011-2014. If I had to guess, I'd say that a character named *CAPTAIN AMERICA* might not be quite as appealing to the average non-US movie goer as a more generic superhero. GotG, lacking that naming handicap, will, I think, do a better job of turning its domestic BO into OS BO.
In conclusion, I think you're a little overconfident here. Sure, its possible, even probable, that GotG has a $70M+ opening weekend. But I can think of (unlikely) scenarios in which it comes in at a $60-65M opening weekend. And if that's the case, there's almost no chance of it reaching $600M and anything else going wrong (the Chinese hating it for cultural reasons opaque to me) could put it sub $500M.
Sure, I don't *think* that's what will happen, but it might. If you're rolling a 6-sided die and need to roll a "2" or better to win, you've got an excellent chance of winning. But 1 time in 6 you're going to lose.
PS - Put in a few edits.