I refer here to the J. Michael Straczynski Babylon 5 script books published over the past several years; in particular the first and final volumes (Vol. 1 and Vol. 15), which lay out a number of character and plot-elements that are simply far too similar to be coincidental, and which may or may not have been "co-opted" by Paramount years later when directing the initial DS9 series format (beyond very superficial similarities such as the space-station setting, jumpgates/wormholes, etc.).
You've asserted this twice without any specifics. None of your extensive quotes of JMS actually mention what any of these plot elements are. You seem to think that just telling me what JMS
felt will somehow prove your case, but that's not how evidence works. If you're going to make claims,
back them up with facts. Not anecdotes or hearsay or emotional rhetoric.
Paramount had gotten a pitch on Babylon 5 (which included the series bible and plot synopses of the first season), turned it down, and did nothing until after B5 was announced, at which point they announced a new Trek show that they had never even mentioned before.
Paramount's motivation was to freeze out Warner Brothers, thinking that a series set on a space station would succeed on the Star Trek name and keep B5 off the air (and it almost did). They wanted to soak up time-slots for their shows and deny them to Warner Brothers (this was back when local affiliate syndication was still huge).
I'm not opposed to the idea that the studio executives may have been willing to play politics in that way. What I object to is the idea that Michael Piller and Rick Berman merely copied JMS's ideas. I believe they came up with their own ideas for their own reasons, and maybe Paramount embraced or encouraged those ideas that happened to fit into their desires to shut out B5.
After all, as I said, parallel ideas are created all the time. That means that if a network or studio does want to copy something, they don't really have to come up with something new -- they can just latch onto something that a creator came up with independently in good faith. For instance, Donald Bellisario's
Tales of the Gold Monkey was accused of being a
Raiders of the Lost Ark imitation, but in fact Bellisario pitched it to ABC before
Raiders came out, and it languished in development hell until
Raiders was a hit and ABC was eager to grab its coattails.
But when one reads through Straczynski's pitch-notes, the conceptual and storyline similarities present at the start of both shows are numerous; far too many in number for the usual trend of coincidental, parallel industry-development to account for.
If that's true, then you should be able to cite specifics instead of just spouting the same unsupported generalizations over and over.
Not back in 1986. Which is when the "changeling" element first appears in JMS's original notes.
Please stop using the word "changeling." It's prejudicial. What you mean is "shapeshifter." The use of "changeling" as a synonym for that is unique to DS9, while shapeshifters have been a concept in science fiction going back generations and in mythology and folklore going back millennia. So by anachronistically applying the term "changeling" when you mean "shapeshifter," you're deliberately trying to prejudice listeners to believe there was direct imitation, and I find that a dishonest rhetorical tactic.
I mean, come on -- it's hard to find a science fiction series that
doesn't have shapeshifters in it. The original
Star Trek (which was a clear influence on
Babylon 5 in a number of ways) had multiple shapeshifters, including the Salt Vampire, the Kelvans, the Antosians/Garth of Izar, and the Vendorians in the animated series, plus the Chameloids in the sixth movie and the allasomorphs and the coalescent organism in TNG, the Silver Blood in VGR, etc.
Doctor Who featured occasional shapeshifters such as the Rutans, the Axons, and arguably the Doctor and his fellow Time Lords.
The Twilight Zone featured a shapeshifter in "The Four of Us Are Dying." And of course comic books have had shapeshifting characters going back to the Silver Age, like Clayface and Mystique. Shapeshifters are a dime a dozen in sci-fi.
And if you're going to riposte that both B5 and DS9 differed from those others in having shapeshifters as regular cast members rather than guest stars, let me direct your attention to the 1976-77 season of
Space: 1999, which co-starred Catherine Schell as Maya, a Psychon who could shapeshift into any living being. So having a shapeshifter as a regular was nothing new.
So it's not the tiniest bit suspicious that two different SF shows would both have shapeshifters in them -- unless you create the illusion it's suspicious by dishonestly using one show's term for its own specific race of shapeshifters. Which makes about as much sense as calling the Narn "Klingons."
Like I keep saying, if you ignore everything but the two series you're fixated on, of course you won't consider the possibility that they're
both drawing on earlier influences. Context. Deal with it.
Incidentally, if believing that DS9 copied in any way from B5 is a result of "small-minded thinking," then I guess Straczynski himself (a longtime industry veteran) must've been suffering under the exact same delusion.
Even industry veterans can have hang-ups and blind spots. Look at Gene Roddenberry's belief that he was always in conflict with network executives who were out to undermine and sabotage him. Personal beliefs are not evidence of anything except what those persons believe.
And as I've said, I'm open to the possibility that Paramount may have had some less-than-salutary designs here (though I'm not convinced of it), but I don't believe that Berman and Piller themselves were plagiarists. I've read enough about the development of DS9 to be convinced that they came up with its ideas independently.