Yes, but Babylon 5 had been in development for several years with J. Michael Straczynski pitching to numerous studios, including Paramount who he gave a copy of the series Bible and other reference materials to. Allegedly they kept them after passing on making the series, and he has expressed his belief that they plagiarized his ideas when they conceptualized DS9. To be fair, he says he does not think he was directly plagiarized by the writers of DS9, but that Paramount ripped him off when they designed thr DS9 concept.