That's a pretty wild claim to repeat. Not a single person on the original team agrees with it, and they've filed the copyright registration in court[1]. There's basically no evidence at all for that conclusion, except that Stardock made the claim (not supported it, not provided evidence of it, merely made the claim)
Even if you do believe it, it's legally irrelevant as the team has signed the copyright over to them[2], and they released The Ur-Quan Masters back in 2003 using that copyright.
I was a member of the community back in the lat 90s/early 00s and this was common knowledge even back then.
[1] https://www.courtlistener.com/docket/6239751/71/6/stardock-s...
[2] https://www.courtlistener.com/docket/6239751/64/5/stardock-s...