I'll risk being probated for this:
Avengers and TDKR have something unique in common. They're are eventually BOTH about heroes coming together to stop a threat that threatens their existence.
Whilst Avengers is a list of higher name Superheroes TDKR is ultimately about the joining of the heroes of Gotham.
Everything in TDKR is about choice at some point. Batman has to CHOOSE to come back. Selina has to CHOOSE to do the 'right' thing. Gordon has to CHOOSE to continue his cop duties. Blake has to CHOOSE to fight for Gotham. They could all flee and they could all leave Gotham to it's destruction but at the end of the day you have these heroes coming together to fight Bane.
Batman, Gordon, Selina, Blake, Foley They make the tough choice of facing death in the face. Unlike BB or TDK tomorrow at the end of TDKR is not assured, there won't be a second chance at this. They could lose it ALL at the end and these heroes come together to combat this larger than life event.
What makes it so much more potent for me is that Gordon, Selina, Blake and Foley aren't wearing protective armor or have Ninja training. These are NORMAL people riding motorcycles next to huge tanks, one wrong shot and it's all over for them. They're putting their lives on the line and facing near certain death in the face for Gotham and Batman is at their side.
It's going to be emotional.