Hmm, I don't know gandalf. A movie about erecting temples to secure the belief of the masses... sounds both controversial, and maybe even a little boring
. And it kind of sounds like you're fighting LA ermor in an EA setting? The purists would have your head! There is a certain ringing of truth to your final paragraph though :P.
I would probably go in a different direction. Say, vanheim and helheim fighting side by side to turn back a niefel apocalypse. Or a stalwart band of heroes who set off to do battle with a powerful moloch who is corrupting the people of ma/la marignon and attempting to become a god. Or perhaps a movie about ulm and the malediction... that could make for an interesting story.
The problem with making a movie out of dominions though is that it's hard to make a dominions movie without just making a movie about various mythologies. Most cool and thematic wars you can think of (fomoria vs TNN for example) would be really tough to do without heavily referencing already existing mythology. That's not a bad thing, but it wouldn't really stand out as being
dominions. If someone wanted to make a movie based on dominions, ultimately I feel that it would be best to use at least one of the nations that is more or less completely original, like agartha (the story of just what is behind the seal could make a good movie). Not that there aren't lots of cool things you could do with the dominions universe. You just want to avoid cliches, make the movie stand out as being dominions and not various mythologies in general, and avoid things that only really make sense in the game, or else the world feels hokey and unrealistic.