10. ...And There ARE Shocks
And on the same point, it's impressive how much of the film the studio managed to keep locked down. Sure, there were lots of leaks that were absolutely spot on, but through a campaign encouraging the consideration of misdirection and the not-exactly unconscious encouragement of the spread of fake leaks (or so I suspect), they managed to ball up the real leaks with falsities.
That meant that certain of the more ridiculous, unexpected elements that leaked were simply batted away as impossible because of their absurdity.
And even beyond that, there are some key story elements that happen - and crucially, some that DON'T - that will have come as a surprise to even the most committed of spoiler fiends. In 2019, with this film ranking as the most valuable possibly ever in spoiler terms, that is incredibly impressive.
There really is something to be said about being willing to be sillier than anyone would think viable.