Just catching up here so my comments will be all over the place.
While I like some aspects of these spoilers, I don't think they're true. Kinda bizarre that someone so close to the production will break Nolan's trust and leak stuff like that. Regardless, I like aspects of it so I'm fine if they turn out to be true.
IMO Bane's mask will be a key factor to his defeat but it won't be the case where he suddenly drops dead or faints when the mask breaks or is removed. I like the idea suggested by
Brain Damage that Bane loses control when the mask is broken or removed. After it breaks, he goes even more animalistic and attacks in a frenzied state like a wild dog and he loses his control and thought. He goes all out attacking Bats without any strategy while Bats remains his cool and is just wearing his down.
I'm still sticking to my theory that Bane dies by his own hand. Bats will defeat him and this won't go so well with Bane's ego. He can't believe that the guy he defeated, broke and so arrogantly gave the permission to live and/or die came back better than ever to defeat him and reclaim the city he wants to destroy. Bane will taunt (or even beg when taunting doesn't work?) Batman to kill him but Bats will not have any of that so Bane kills himself. I'm not fond of it but I remember some suggesting too that maybe Catwoman will kill Bane. I don't like it because I think the fight should just be between Bane and Bats but I can easily imagine a scene where Catwoman looks at a defeated Bane in disgust and breaks his mask with her heels. I mean those heels have to do something right?
Regardless of where the last fight is, I sure hope that it's satisfactory. We are expecting the first fight to be brutal so the last fight should be just as brutal and maybe even more so. We should see both men give it their all. I'd like to see the fruits of Batman's re-training and see the Batman that was broken mentally, physically and emotionally in the first fight reclaim his rightful place in the last fight. I recall
Bosef saying that we would all be cheering for Bats in the last 40 mins or so of the movie so my hopes are high that we are a getting an extremely satisfying final fight.
I don't think the City Hall fight will be the last Bane/Batman fight but I guess we should also consider that it's possible.
I suppose being that this is the last of the trilogy, Nolan will need time to tie up all loose ends and end up the trilogy with a more emotional state so I can see the action sequences (Bane/Batman fight, chase scenes, etc.) ending earlier and then Nolan focusing more on the emotional scenes. Kinda like in LOTR.
I don't know. I've rambled too much.