So the villains attack Bane, all hoped up on venom, and bring him back to Arkham (which he allows). Then the venom begins to have side-effects on everyone, because they can't handle it, where Bane can, and he beats everyone. Penguin shows up, and makes Bane an offer, supplies for the Arkham inmates. Bane agrees, but on two conditions, first, he never sees another one of the Arkham inmates in his city again, and two, he keeps Scarecrow. So then Bane goes full on The Dark Knight Rises with his fluffy coat, strings Scarecrow up as a message, and there you go, he wins Gotham.
Art was nice. There was some great action scenes too. Pyg hopped up on venom sounds more like the Pyg I know and love.