This sounds a bit like one of the show concepts that didn’t get greenlit in favor of voyager; a crew of escaped federation soldiers enhanced with borg technology by section 31 to fight in the dominion war was set to be liquidated because the war ended before they could be deployed and the Federation didn’t want word to get out that they did such experiments. The test subjects managed to escape on a starship and are now on the run from everyone, including the Federation.

I wish they’d made this series.