I say this as one who also thought DS9 was the "best" of all Trek series overall, and would love to see that cast on the big screen, but that just is not going to happen.
I'm actually glad that DS9 escaped. I don't want a JJ Abrams DS9 action film with Sisko telling Kira to "Buckle up!" as a 2-dimensional shouty caricature of Gul Dukat screams "Fire everything!".
DS9 was so great because it didn't have to water itself down too much. Which it would have had to have done if it become a Hollywood blockbuster.
As it stands, its legacy is untarnished. Best Trek ever.