This is actually a great idea, believe it or not.The biggest missed opportunity is still Bruce not returning to Gotham in his Begins suit as a last resort after having his armory and suits stolen/destroyed.
When watching the film and seeing the crowd of cops slowly advancing toward Bane's army, I kept imagining Bane seeing something in the sky beyond them - a shadow passing over the group of cops which forces them all to Spielberg Look™ above them. Then Batman - Begins suit Batman, that primal - scary motherfucker reborn, lands in front of Bane and that is what rallies the cops to charge before Bruce rips Bane apart.
TDKR was missing that gliding Batman shot. Plus, there wasn't enough of a "fuck yeah" build up to Bruce's second return and this would have been great moment. Batman entering like a goddamn boss. Man, I would get rid of Talia and Blake. I'd do the surprise twist reveal for Bane being in the League of Shadows when he's destroying Bruce. And I'd spend more time with Bruce once he escapes the prison and is returning to Gotham. Just some scenes where he's reconciling what he's become with what he was supposed to become. It would give a little more time to build to his second return.
This movie is filled with missed opportunities. They made Talia such a shit character in this when she's supposed to be so much more. And fuck Blake like always.