There's no way they'll go to VOY before DS9. VOY stops using motion capture model effects fairly early in the show, so it'll be far more difficult to replace four seasons of CGI than doing a remaster of DS9.
Wouldn't it be actually easier
to remaster Voyager
, for precisely that reason? Meaning, you wouldn't have to mess around with recompositing model shots or anything like what they're doing with TNG-R, just do all new animations.
Notice how I said easier, not cheaper.