I struggle with this one.
I really want to like it! I applaud a sequel that’s bold enough to open with “everything in the first one didn’t matter and all the survivors are probably dead, here’s a brand new vibe and premise.” It’s well acted and the first 45 minutes are terrifically fun. I definitely did not have “desperate mercenaries fighting zombies with guns while plucky kids ‘Home Alone’ them” on my Train to Busan 2 bingo card.
But after that, it kinda runs out of ideas and plays a mashup of “Zombie cinema’s greatest hits” combined with “Oops, we forgot this was a sequel so here’s a bunch of melodramatic allusions to the first one.” The action gets a bit stale and there’s a lot of frantic running and crying.