SilverWook said:
...DS9 had a more complex storyline than TNG or Voyager, and that's a harder sell to fickle studio executives who want a blockbuster movie they can easily promote to non fans.
Agreed. The movie would have to start with a lot of exposition that would, by necessity, spoil much of the series. A Voyager movie can only go four ways.
1. The status quo doesn't change.
2. Something like "The Caretaker" but with the array used to take the cast home. See 3
3. Alternate Universe that may or may not be canon.
4. Post-"Endgame" reunion.
I can see why the TNG cast was used for the movies. TNG doesn't have complex story arcs like DS9, nor does it have an overall goal that would interfere with movie making like Voyager. Using the TNG cast would have been the safest option at the time.