Stan wrote the majority of episodes of season one of JL.
Then first time the Royal Flush gang was introduced into the DCAU was with a script he wrote for Batman Beyond.
One time, he was interviewed by Toon Zone's hosted site: World's Finest.
There where two episodes in the DCAU that involved traveling to another dimension meeting a tyrant Superman. Stan wrote both of them.
Stan Berkowitz's first episode that he wrote for Batman was the fourth episode "Never Fear" of Batman: Gotham Knights.
He first wrote for the DCAU in Superman The Animated Series.
He didn't write for Batman The Animated Series till Batman: Gotham Knights came around.
He is currently working on a project called Friends and Heroes.
No longer works for Warner Bros, he now works for a company in England.
Stan: (About the Legion of Superheroes being in STAS.) I don't know the answer to this one because I didn't come in until the re-write stage, But in general it was hard to get guest stars from other comics, because the film and TV rights had often been sold to other companies.
Stan: (About Doomsday in Superman/JLU) As far as I know, there was no plan to use Doomsday in Superman. After all, "he" was kind of an uninteresting villain, wasn't "he"? As far as using "him" in "Better World," it was a good way to show just how much of a badass the Justice Lord Superman was. The fans knew that in the comics, Doomsday was so tough, "he" killed the real Superman. This new Superman is so much tougher, "he" dispatches the monster with nothing more than a blast of heat vision.
Stan: (About the Superman episode "Brave New Metropolis") Alan wanted to do an alternate world romance, and I eagerly volunteered. I've loved alternate world stories ever since It's a Wonderful Life. When I read an account in Spy Magazine in the late eighties that considered the scientific possibility of alternate worlds, I decided to do one for Superboy. In that two-parter, Superboy goes to not one, but two alternate worlds. In one, "he" sees what the world would be like if he broke "his" rule about killing people, and in the other "he" sees a world where an egotistical Superboy had become dictator. Not a pretty picture. Later, we did two more. One of which featured a very young Superboy, and the other an older, retired Superman. Many years later we took on the Justice Lords. I think people like these stories because they're always wondering how their lives would have turned out if they made different decisions. Either that or they just like to see their heroes in cool new costumes.
Stan: (About the different between writting for Superboy and wrtting for Superman.) Back on Superboy, we tried to view our hero as pretty much full grown. It helped that the actor who played him, Gerard Christopher, was well into adulthood (though quite youthful looking) when he signed on for the part. Even so, Superboy was a little less sure of himself and a bit less dominating than the somewhat older, more experienced hero of the Superman animated show. So I had to take that subtle difference into account, which was not difficult.
Stan: Batman's dark outlook tends to be a good counterpoint to Superman's rosier view, so the combination can lead to some interesting philosophical exchanges. My first experience writing for Batman was the story in which Scarecrow found a way to eliminate people's normal fear. It was a nice change to write for a character that was human, and therefore more vulnerable than the super-human Superman. Much easier to write for, too.
Stan: (About An Unused character that he wanted to use) I liked the Spectre, but someone else had the rights.
Stan Berkowitz: (asked how he started working on "Superman") I was working on Spider-Man in 1995, and John Semper told me that he'd read in the trades that Superman was starting up over at Warners. Since Spider-Man was winding down at that point, he suggested I give them a call. Oddly enough, my doctor, who's always been interested in show business, also gave me the same advice. So how could I not do it? I had my agent call Alan, and Alan was apparently impressed that I'd worked on the live action Superboy, so he soon had me working on the "Way of All Flesh" script. Most stories about how people get jobs are a lot more complicated than this one was.