Although I've been stockpiling all Superman and Action issues, I haven't read them all yet. What is the current status of Kandor, Is it in another galaxy?

Kandor of the Silver and Bronze Age was a little too Utopian to provide much story meat, which is why it tended to be used sparingly. I think the best you'd get, of that era, was pretty much what we got in the World of Krypton mini-series, that DC published in the early 80s (the so-called "first mini-series"). Most of the material, though, had been presented in previous stories, particularly the World of Krypton back-up stories in the Superman comic, in the early 70s (the Kryptonite No More run). There were some great little stories there.

Outside of that, you had the Nightwing & Flamebird stuff; but, those tended to be kind of run-of-the-mill.

Where I thought there was potential was when Superman succeeded in returning Kandor to its proper size, on a derelict world he had discovered; but, the process destroyed the buildings and infrastructure of the city. The citizens were going to have to rebuild, from scratch. Meanwhile, the planet was actually a dimension shifter and was about to switch back, forcing Superman and Supergirl to leave the Kandorians to their future. DC really didn't do much with it, other than the Krypton Chronicles mini-series, where they had been rebuilding; but, were just a framing device for more history of the El family. I would have liked to have seen more of the Kandorians trying to rebuild their city, without the benefit of the technology that was lost. I don't think you could get a series out of it; but, you could probably manage at least a mini-series, if not a maxi-series.

John Byrne and Mike Mignola explored his post-Crisis revamp krypton, where Kandor was just a city on the planet. There really wasn't anywhere to go with that. Byrne's intent was that Krypton and its legacy, part from Kal-El was gone. Even kryptonite was limited to one piece that came to Earth on Kal-El's ship/birth matrix.

It's been done in bits and pieces; but, I'd like to see an in-depth examination of Bruce Wayne's journey to becoming Batman. That was the pitch for the tv series that instead became Smallville (it was originally pitched as a Bruce Wayne series, but rejected, then turned into exploring Superman's adolescence). It is what people hoped for with Gotham; but aren't really getting (based on criticisms I have read; I bailed after a couple of episodes). I'd like to see a maxi-series that takes him from the young, scarred boy to the man who is returning to Gotham to launch his war on crime. I would stop before he puts on the costume, as Year One covers that well enough and I don't think you need to rehash it. I'd go from the day after the murder (metaphorically, at least) and take it up to him boarding a plane to go back to Gotham (s we see him returning, in Year One). Take him around the globe, as he studies with different masters, maybe even using the idea of him studying with Zatara, as done in BTAS.

I'd also like to see an exploration of the time between the Golden and Silver Ages, where the heroes are gone or operate in shadows and focus on those groups and individuals that arose to take their place, like the Challengers of the Unknown and the Suicide Squad. Darwyn Cooke certainly wets your appetite for that in The New Frontier; but, I'd like to see it examined more thoroughly. I'd also like to see more of the DCU before the dawn of the superheroes; things more like Guns of the Dragon, where it is post-WWI pulp adventure, with Bat Lash, Enemy Ace and Biff Bradley. Things like the Brian Savage Times Past stories of Starman, where you see the turn of the century, as the Old West gives way to the modern world. I'd be more interested to see characters like Jonah Hex face the end of the frontier and the beginnings of modern life, like John Wayne's The Shootist.

I'd also love to see a series like Legends of the DC Universe, and Brave and the Bold (the later version) that focuses on some of the more obscure characters and their adventures, much like James Robinson's Vigilante mini-series, City Lights, Prairie Justice. Examine some of those lesser heroes, like the Quality Manhunter or the Jester, Captain Triumph, Johnny Quick, Hop Harrigan, Tex Thomson/Mr America, the Paul Kirk Manhunter during the war, etc. Explore what happened to the war comics characters, after the war.

I'd also like to have (hell, I'd like to write) a series that takes those classic war comic characters from the start of WW2 to the end, without superheroes and the supernatural. I brought that up before, which begged the question of the Haunted Tank and I think you can do that with the idea that the ghost of JEB Stuart is all in Jeb's head, which was pretty much the premise of the comic. I'm more interested in the tank crew characters being there to provide the perspective of Patton's forces, rather than the premise of the tank being haunted by Stuart's ghost. So, no Creature Commandos or Viking Soldier (though that could just be a nickname). I'd make the Losers a Marine Raider unit, operating much like the Alamo Scouts, in the South Pacific, which means switching Johnny Cloud to the Marine Corps, which has more historical precedence, via the code-talkers. M'lle Marie provides the experiences of those in occupied territories, as well as the resistance fighters. Sgt Rock provides the GI and I would parallel Lee Marvin in Sam Fuller's The Big Red One (which felt like Sgt Rock, to me). I'd make Blackhawk into a squadron in the RAF, flying Mosquito bombers, involving them in the strategic attacks on the heavy water plan in Norway and the mission to free Maquis leaders in France (both actual Mosquito missions). The Unknown Soldier would provide the perspective of those special operations soldiers/spies with the SOE and OSS. I'd want to cover the Eastern front; but, am not sure I'd go the route Garth Ennis did, with Eney Ace. He never convinced me that someone like Von Hammer would ever fly for the Nazis, under any circumstances. I think I would use him as a perspective of the rise of Nazi Germany; but, not a combatant for either side. I might throw him into the plot to kill Hitler. Not sure what that leaves for the Russian front, other than creating a new perspective character.

I'd also like to see (again, write) a maxi-series that follows the superheroes through their WW2, beginning to end. James Robinson's Golden Age put that idea in my head, as did the JSA mini-series, that predated the relaunch of the title (with Robinson co-writing the early issues). It would be a nice mix of that, the All-Star Squadron, and the JSA origin from Paul Levitz and Joe Staton.

Last I can remember it was enlarged & placed on another planet called New Krypton.

There are quite a few things find more than a little intriguing about Kandor.

First off, there's the Superman Emergency Squad, a bunch of tiny Supermen that show up when Superman is in trouble. They are kind of hilarious, but I bet they're a big deal in Kandor.

And then there's Lesla-Lar. Those issues of Adventure where Lesla-Lar is conspiring against Supergirl (and changing places with her when poor Linda is sleeping) give lots of little glimpses into life on Kandor.

It's been a while since I read them, so I may not have this exactly right, but it seems like life on Kandor was fairly regulated and one of Lesla-Lar's problems was that she was bored. The restlessness of Kandor's youth could be a stepping-off point for a series. And I love Lesla-Lar! It would be great to see her right in the thick of it in any Kandor mini-series. She could be gathering all the Kandorian youth who have been rejected from the Superman Emergency Squad.

I would love an Avengers series involving the Original 5 back in the day.

I did get all of the Avengers stories. I was thinking to do an ongoing series that shows more unknown adventures.

Yeah, You're probably right but It's on my personal wishlist. Many of the proposed concepts mentioned here are also projects that wouldn't sell  either.