Re: How long should the new series go on for?
I like how Nolan did the origin story and an ending story in his more down to earth universe. And it was done in a more cohesive trilogy, which was rather easy because it was so closed-off from the rest of the DC universe. This benefits the reboot.
Now this more sci-fi or horror (I hope!) reboot that is OPEN to a larger universe...they can do all the "in-between" stories and let it go on past a trilogy. Not making too many jumps.
From the post-origin stories in Year Two-ish all the way into a mid-40s veteran Batman who is working with Robin.
They can deliver 6 movies and it would be fresh, of course they would need to recast.
"Guys, what would be your reaction if Alfred was Batgirl in this movie? You go watch the movie, everything cool, halfway through, Alfred becomes Batgirl."