Heh, well, that’s certainly true, but I saw it (in my head at least) as being more streamlined.
Scene 1: Large screen plasma TV in the background has a commercial on for Mutant BeGone Serum, buy one get one special. Warren Worthington asks his secretary about some new account that his firm was trying to land, only to be told that they decided to go with someone else. He asks why, she says, timidly “Well… I think it was, ya know… the wings.”
Warren sighs.
Scene 2: Cut to Warren in a Rolls driving down the highway, radio is on and talking about Mutant BeGone Serum. A look of intense frustration crosses his face and he swerves to the off ramp, other cars honking at him as he nearly causes an accident.
Scene 3: Warren walks down a very sterile looking hospital corridor while a nurse gets his vital statistics. He does not see, but the audience sees several mutants held down on operating tables with large metal restraints. Warren is taken to an operating room, put on the table and told to relax and that a doctor will be with him soon. The metal restraints pin him to the table and he starts to get agitated, demanding to know what’s going on. A voice from the corner of the room (which has been in shadow) says “You are going to become Death, destroyer or worlds, and one of the Four Horsemen of Apocalypse!” Apocalypse steps into view, looking suitably evil. Warren screams as he’s injected with some glowing green liquid in a syringe.
Cut to opening credits: “We are mutants. I used to play Captain Picard. I had a phaser then. But now I can kill you with the power of my mind. I still don’t have any hair though.”
Scene 4: Shot of ‘time portal’ opening up and Rachel Summers stepping out dazed and shaken, she walks to a nearby bus stop and looks at the map, tracing her finger along a route that terminates near the X-Mansion. She turns and starts walking up the road before glancing back at the plastic bus route map, and ripping it off the post via telekinesis.
Scene 5: X-Mansion, RS shows up, X-Men are suspicious, Xavier confirms that she is who she says she is, is from the future, and is Scott’s daughter. Scott is blown away when she tells him that Jean is still alive. While he’s still digesting that new tidbit, the Four Horsemen attack the X-Mansion and attempt to capture several mutants. Big fight. Rogue kills Ms Marvel, gets super powers. Kicks ass. Horsemen run away, maybe carrying a few X-Brats.
Scene 6: Text on screen = “deep in NORAD”. Stuff shirts mull over video footage of X-Mansion attack, video taken from an agent who got into the Mutant BeGone Serum facility and got a bit of footage of their experiments before being killed, maybe the last bit of film has Apocalypse crush the guy’s head, or something. Stuffed shirts talk about “mutant civil war”, decision is made to “activate Project Sentinel”.
Cut to view of giant underground warehouse and pair after pair of giant glowing eyes lighting up.
Scene 7: Montage, Apocalypse’s forces capturing/killing mutants. Sentinels capturing/killing mutants. President demanding that the Sentinels be reigned in, smooshed mutant children on the six o’clock news are bad for his reelection campaign. Stuffed shirt tells the prez "The Sentinels were designed with a heuristic algorithm that is inherently self augmenting. Erm, that is Mr. President, they can learn and make tactical and strategic decisions on their own and it seems that they’re no longer accepting any alterations to their mission parameters.
Go from there. Whee.
Giant robots, Apocalypse, mutants.
Happy, happy Finn.