I've got it at $1.9 billion. It all comes down to China - the film is set to open to $200m+ OW there, but it's a matter of whether it can manage a 2x multiplier or not.
It's not going to top Black Panther domestically. After beating it by $55 million OW, its second weekend lead is down to $1 million (and Black Panther's Saturday and Sunday both topped Infinity War's). It's starting to fall off pace. And whereas Black Panther had a cushy schedule, where its biggest competition in its first five weeks was A Wrinkle in Time ($33 million OW), Infinity War has to deal with Deadpool 2 and Solo - both probable to launch around $130-150 million.
At this point, I'm going to say it finishes at $660 million in the U.S. and $1.95 billion worldwide.
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