Convenient how you're ignoring everything in my post addressed towards you, and pounce as soon as you have something new to harp on. Constant moving of the goal post is a sure sign that a typical TDKR debate is in effect.
But yeah, considering the fact that the series starts on the question of whether or not Gotham is "beyond saving", and Bruce had sacrificed so much to save it...it's pretty much Drama 101 to face Bruce in his final hour (as Batman) with the past coming back to haunt, and the threat of everything he's done for the city being all for nothing. Not to mention the fact that legacy themes (with Thomas Wayne) were a huge part of BB that simply was not touched on at all in TDK. If you're going to end a character's arc, you have to look at things in the beginning. It's the same principle as setting up something in Act 1 of a screenplay and paying it off in Act 3. It's just basic storytelling.
Lol and milost, you're stealing one from my playbook with the Scream 3 clip. I've posted that before to backup my own points. It really all depends on what one wants in a threequel. I'm actually a huge fan of the Scream franchise, and Scream 3 is probably the worst. But it's not because they tied it back to Scream 1. That was actually the best part of it IMO. It made a lot of sense tying Maureen Prescott's origins back to Hollywood, it fit the themes of the trilogy like a glove. It's the worst mostly because of the more comedic, "Scooby Doo" tone. But the commentary on trilogies and the way they dealt with it in their typical meta fashion was really cool.