I think I get what you are saying. So if The Nolan Trilogy kicked off the DC Cinematic Universe?
Well considering the Dark Knight Rises had Batman retire and hinted at Joseph Gordon Levitt taking over, I would start there.
First I would have JGL take over, but not as Batman but more of the Nightwing Character (skipping over the Robin stuff). You could do a movie with him to establish that and then go right into Man of Steel in it's current form because I dug that movie. The events of Man of Steel lead Batman back into service with Nightwing helping him out.
Now from there instead of Batman being pissed right away and wanting to fight Superman, the next movie is called World's Finest (like the comics!) and is simply Batman and Superman figuring each other out because of a new threat emerging. It could still be Steppenwolf or one of the Old Gods who have been awoken by Superman's arrival, whatever. They need to build towards Darkseid properly, though.
Next they could do another Suicide Squad movie but with a better story. Instead of them fighting a god level being, have the Squad go to South America to fight a drug kingpin who is pushing a new drug called Venom. SURPRISE! It's Bane! But not the small Bane from the last Dark Knight Rises movie, he's pissed and full of Venom and jacked like he is in the comics. The Joker could still be Leto without the Tattoos, and he is hunting the Suicide Squad to get Harley back while they are going after Bane.
Then Wonder Woman could basically be the same movie to get her back involved and Gal Gadot is perfect for the role. Then you could do some combo movies to get the b-listers going. A Flash/Cyborg movie (same actors from Justice League), Aquaman solo flick, and then a Green Lantern movie with Tom Cruise because why not? Then you have more villains established, more hero backstory, and the stage is set for Justice League Part 1.
So here is how it would look:
- Batman Begins
- The Dark Knight
- The Dark Knight Rises
- Nightwing
- Man of Steel
- World's Finest
- Suicide Squad with REAL Bane
- Wonder Woman
- Flash/Cyborg
- Aquaman
- Green Lantern
- Justice League Part 1
- Man of Steel 2 with Braniac
- Legion of Doom Movie of some sort
- Justice League Part 2
To be honest though the Nolan trilogy is a good stand alone series of movies and their real world aesthetic doesn't lend itself well to the rest of it. It could've worked maybe. That is how I would do it.