Disney and Lucasfilm unveiled 28 minutes of footage for reporters on Friday at Skywalker Ranch, teasing the origin story of the band of rebels who aim to steal the plans for the Death Star — the event that sets into motion the plot of the original 1977 "Star Wars." [...] twists and turns seem to await spectators in "Rogue One," which finds a grown Jyn (Felicity Jones) in cahoots with the rebel alliance on a dangerous mission to try to stop the Empire from building their planet destroyer. The film was screened for the cast recently, but few have seen the final product, which will premiere Dec.