the Oscar winner has four black men in their sixties meet up for a happy present-day reunion at a hotel in Ho Chi Minh City.The buds — called the “Bloods” — are back to their former battlefield, we learn, to retrieve the remains of the fifth “Blood,” Stormin’ Norman (“Black Panther” star Chadwick Boseman, in flashback).So, this must be Lee’s reckoning-with-’Nam film, you think.