I've never watched every episode of DS9 like I have TNG or VOY. Or if I have, it was just once and I don't recall the details. Was there ever a mention of the disappearance of Voyager on the show DS9? Even just a throwaway line. The only thing I can think of is in the 2 part episode The Maquis of DS9, didn't Sisko say something like "There have been a number of unexplained disappearances in this region". But this would have been before Voyager disappeared, but maybe not before Chakotay's ship vanished. I assume Sisko meant the Badlands. I guess this may have been part of setting up the premise for Voyager as well as the 2 TNG episodes Journey's End and Pre-Emptive Strike. I know the Maquis storyline was used on DS9.