Back in March, Universal Pictures used this vid to offer “Jem and the Holograms” fans a chance to appear — briefly — in the upcoming movie, with winners selected based on “Jem”-inspired videos posted on social channels. Perhaps they didn’t quite get what they were looking for because it turns out, on-screen fan appearances will be limited to short excerpts from their video creations. Producers have yet to determine how many user-submitted clips they may include in the final cut. Trailer looks cute though.