It would be cool if they would start off with Bruce as an established but still relatively young Batman, and the first season is basically Dick Grayson's intro and development, with the two of them basically co-headlining the show. If the show as a Smallville-like run, after a few years, have Dick become Nightwing and go off on his own, showing back up a few times every season to check in and help out.
Season 1- Batman meets Dick at the very beginning, Dick becomes Robin slowly over the course of season one, with Bruce finally accepting that he is a full on "partner" in the finale.
Season 2- Batman and Robin kicking ass and taking names.
Season 3- Trouble starts, they have more and more disagreements, possibly regarding Dick's future. After defeating the big bad in the finale, Dick takes off to be Nightwing.
Season 4 (or maybe 5)- MAYBE have Jason Todd introduced fairly early in the season, with him becoming Robin midway through. Season finale, though, would be his death.
These are just ideas. I know it'll never happen, but I would be interested in seeing them try.
LOOOOVE the idea of a one hour action/drama/mystery series. Here's how I would like to see it:
Season 1: Batman on his own with a lot of self enclosed, mythology building episodes, but with the season long arc being the fall of Harvey Dent with the birth of Two-Face in the 2-part season finale. Lot of gangster villains, and characters like Black Mask, Deadshot, and Firefly.
Season 2: Introduce Dick Grayson in the season premier, building the character and the relationship between him and Bruce and culminating with him finally becoming Robin in the finale. The big, season running villain arc could be Hugo Strange and do a more fleshed out version of the ideas I laid out for a movie on the last page. You could really start to delve into the city of freaks idea in this season.
Season 3: Batman and Robin in full swing. After his introduction in the first or second season, we pick up on The Joker in Arkham and the season arc is his manipulation and mental perversion of Dr. Harleen Quinzel until she becomes Harley Quinn and busts him out. The Season-long heavy could be The Riddler.
Season 4: Introduce Ra's al Guhl as the big bad with the two-part season opener being an adaptation of The Demon's Quest. Go into Bruce's relationship with Talia and all that. Maybe this is also the season where Dick starts to pull away and become his own man, perhaps Nightwing by the end of the season.
Season 5: Hush. Just straight up adapt Hush as a season of television, it would be great.
Season 6: Introduce the new Robin, my feeling is to skip to Tim Drake, but I could be wrong. I would like to see something really big and different for the sixth season, maybe an adaptation of No Man's Land, maybe even Knightfall. It could be cool seeing Bane's full on plot be executed, breaking the rogues out of Arkham and all that.
Maybe go beyond six seasons, but this is all off the top of my head.
Just the ideas for single episodes would be amazing for a show like this. You could switch between action, detective, and horror genres like crazy from episode to episode. You could do an episode where Bruce keeps flashing back to different parts of his training to help him get out of situations he's in in the present. I would love to see a Die Hard-esque episode where someone like Two Face breaks into the Wayne Enterprises building and Bruce is stuck inside, trying to stop the hostage takers without being found it. Sigh, it'll never happen, but it's such a great show in my head.