How can they possibly save half of all living beings in the Universe?

Rating: 6/10 (5 July 2019)

How are the surviving Avengers & Co. possibly going to save half of the Universe that died? My wife & I had this discussion before viewing. It basically comes down to two options (assuming the events in "Infinity War" weren't just a dream): magic or time travel. All I'll say is: What they came up with was in ways reminiscent of the plot convolutions of "Back to the Future II" (1989).
"Endgame" (2019) begins strong with the devastating reality of half of all living beings in the Universe suddenly vanishing. It starts to get lethargic about an hour in, but perks up with the three teams trying to apprehend the Infinity Stones so they can maybe reverse what happened at the end of the previous film.
Everything naturally leads to a huge battle in the last hour that I found boring, not to mention that the epilogue tended to drag on with too much of it being tedious. Still, there are lots of worthy bits throughout, like the opening, the unpredictable first encounter with Thanos, Thor getting flabby, the moving match between Black Widow and Hawkeye at the cliff's edge, and much more.
Unfortunately, the myriad protagonists work against the film because it can't concentrate on any one or two characters for very long. Captain Marvel is short shifted and decidedly dull. Plus the movie's overlong at 3 hours, 1 minute.
GRADE: B-