V6 spoilers

I think I've figured out what the opening means, not all of it but the part with Qrow. In the opening we see Qrow take a swig from his flask and get grabbed by some Grimm hands, then we see Ruby fighting off those same Grimm hands, so after what we've learned in episode 5 here's my theory. I think Qrow is going to find the bar, they'll all come together, probably to eat, then he'll go off on his own and we won't see him for a bit perhaps because we'll be distracted by a story. Ruby will then notice he's gone and go looking for him and see that the door to the bar is open. Expecting to see a somber drunken Qrow she walks in ready to have a deep conversation only to see he's not there. She goes further in and notices that the lock and chain from the cellar door have been broken off. She'll go down to see what Qrow's up to and be attacked by spooky cellar Grimm. And thus a big battle will thrill us or the episode will end on a cliffhanger. What do you think? Plausible? Further more, I'm thinking maybe those doors don't lead to a cellar, but underground passages that connect the houses. So that they all could see each other through the harsh winter, or move around if Grimm were on the surface. That could explain why there are no signs of struggle around the farm/village and how everyone died in the same way, the Grimm came through those passages and stayed there. They may have broken in through the well, if it were close enough. Food for thought.

I found them. I was thinking to myself "Is team SSSN in volume 2"? Well there they are. Only took a few times watching (been watching the commentaries because volume 6 hype is real).