@M4_ , I've created the mockup/proof of concept that I mentioned yesterday. It's very rough, but it should get the concept across.
Here it is:
https://drive.google.com/file/d/1GEB4q0mp9J1WgezK_SVw344ZnHIeuvoM/view?usp=sharing
This version cuts the Thorin/Azog fight down almost as much as your latest preview did (except for a little bit at the beginning), but the same basic concept could still work with more of the Azog/Thorin fight included, possibly intercut with the sad montage and maybe edited to show Thorin continually losing rather than it being a somewhat even fight.
Azog roaring at 0:33 implies that he's about to lunge forward. It has the implication of forward motion (and just previously, an army of Orcs was shown marching forward). Azog's roar/implied lunge cuts to the bats flying forward (more enemy forward motion)/advancing. This sequence of events is meant to draw out the concept of the enemy advancing for as many seconds as possible before cutting to the heroes losing (ie, the enemy advance builds up the idea of overwhelming odds, before we see how the heroes are being defeated by said odds - we had previously seen them doing pretty well after Thorin emerged from the fortress, after all). I would suggest adding even more enemy attack footage here, if possible. In my opinion, the more enemy attack footage that can be shown before the heroes losing/dead bodies footage, the better.
Then it cuts to Thrandiul, Gandalf, etc tiring as the fight seems hopeless, then dead bodies (more hopelessness), then Thorin being pinned down by Azog (yet more hopelessness), before the tides turn and hope returns. I think that the cut at 1:53 is a nice transition, as it cuts from Azog's head going still from death to Bilbo's head starting to move as he wakes up.
This way, the emotions of the scene smoothly flow from escalating enemy threat, to imminent defeat, to victory, to the bittersweet final denouement of Thorin witnessing the victory and dying.