It seemed to be POSSIBLY the scene where our heroes are meeting King Ghidorah for the first time. KG's coming up from below, the military are on the surface, the ground (ice? it's snowy.) is crumbling. Kyle Chandler's down there with them (on a boat? There's water. Like I said, seeing the beginning for context for locations would've been helpful), while Millie Bobbie Brown and Vera are watching from somewhere up above. In a helicopter, I think. Anyway, we get first the spiked tail, then extreme close-ups of KG's faces and when the crowd witnessing this begins to realize this thing has 3 heads, they start really freaking out. The military starts firing, and then KG's necks start glowing and he summons the lightning (breathing it), blasting the military folks on the ground to smithereens. I can't describe how awesome these lightning shots are, but they look great. The close-ups of KG's faces are the ones I was talking about that look kinda iffy. Anyway, KG's wreaking havoc, and it's clear that Millie Bobbie Brown believes she's witnessing Kyle Chandler's death, as she's getting pretty hysterical, but he's surviving (so far) down there. Then, we see something approaching from below, and Godzilla rises from the water (ice?), epic hero shot, and faces down KG, in a stunning wide shot. And then it cuts to essentially a new trailer with a ton of quick shots of the other monsters (including a shot I hadn't seen of a fighter pilot ejecting from his/her jet only to get caught in the jaws of Rodan), dialogue about how KG has formed a pack and if they can take him out, the others will follow, and there's a great shot of Godzilla breathing fire at KG and KG blasting (no, breathing) lightning at Godzilla simultaneously.