Main clause, hence finite verb (wird) in second position.
I find both future perfect (your former sentence) and future (your latter sentence) unidiomatic. Present tense with future meaning is enough.
Generally, the passive voice is preferred over the active voice when the subject of the active-voice sentence is deemed less important than the object, so the object becomes the subject of a passive-voice sentence (ein Film) and the subject (wir) may be added as additional information if necessary (von uns). I suggest you omit it unless you really deem it sufficiently relevant still.
gesehen is correct. I find angesehen more idiomatic.