Differs from expectations

It was Enfant Terrible's idea to watch Prometheus*.

"Why do you want to watch Prometheus?" I asked.
"Because it's a space movie."

Upon reflection, watching Prometheus because "it's a space movie" is like watching the Rocky Horror Picture Show because you want a little song and dance.

*Verdict: Had its moments, but left the audience largely unfulfilled, even despite the presence of Heimdall, Aeon Flux, the original Lisbeth Salander, a Tom Hardy lookalike, and the requisite number of light humor/cannon fodder peripheral characters.