It has a chance, but IMO, a small chance now, so I agree, I don't think it will. 700M will be a struggle too IMO. The legs from those first 24 markets last week were not that great. We'll see how the legs are in the markets that opened this week.
300M domestic or slightly more. And base on my projection (which are all pretty optimistic in some countries) I see about 415-420M OS.
Not sure about that, not every sequel increase, whether it's domestic or OS. Case in point, Spider Man 2, which is also regarded as the best Raimi's Spidey. But it definitely has a good chance.