Here is a description of the footage of the X-Men: Apocalypse teaser trailer from SDCC
The footage begins with young Jean Grey (Sophie Turner) having nightmares, visions of an apocalyptic future as Charles Xavier (James McAvoy) calms her down, reminding her that it’s just a dream. But it’s not.
We hear Apocalypse speak for the first time, reflecting on his long and storied, god-like history: “I’ve been called any things over many lifetimes, Ra, Krishna, Yahweh…”
Then we see Moira Mactaggart (Rose Byrne) who returns from X-Men: First Class speaking to Xavier: “Ever since the world found out about mutants there have been secret societies, cults, who see them as some kind of second coming or sign of god.” She’s been “tracking” the first of them (Apocalypse) and says “They believe that tens of thousands of years ago an ancient being was born. The world’s first…” Xavier interrupts and completes the sentence: “Mutant.”
Sizzle-reel style shots throughout the teaser of familiar characters including blue and non-blue Beast (Nicholas Hoult), Havok (Lucas Till) in the X-base, new Cyclops (Tye Sheridan) in costume, and young Nightcrawler (Kodi Smit-McPhee) featuring the same lines and design as the X-Men 2 version played by Alan Cumming.
Apocalypse voiceover continues throughout the teaser, and the rest of it goes like this:
“I was there to spark and fan the flame of man’s awakening. To spin the wheel of civilization…”
We see Magneto with old soldiers in the forest.
“You are all my children and you are lost, because you follow blind leaders…”
We see Apocalypse and Mohawk-rocking Storm enter what looks to be the underground lair of the Morlocks where a ragged Magneto (Michael Fassbender) stands with other mutants. Magneto turns and looks at Apocalypse and retorts “Who the f**k are you?” Apocalypse is there to recruit Magneto as one of his four horsemen and says “Come and see.”
More sizzle reel shots: Cyclops blasting at a roof, Quicksilver (Evan Peters) running super-speed through the halls of the X-base, Psylocke (Olivia Munn) in her actual comics costume.
We see Apocalypse and the four horsemen (Magneto, Storm, Angel, and Psylocke) in the X-base and Magneto lifts Professor X and his chair in the air and pulls it towards them with his powers. We see Mystique early in the footage, with a rocker leather jacket and later again, seemingly reuniting with Charles and saying “Mutants are being hunted,” but that she’s there to help, there to fight since there’s a storm approaching.
“What do you see?”
Professor X is using Cerebro, speaking about Apocalypse by saying “He can’t control all of us.” We see him potentially horrified and later when we’re back to this shot we see a tear roll down his face. The next shot of him with the Cerebro helmet sees his eyes turn black and he says “I’ve never felt power like this before.”
The final shot sees an X-base door open and James McAvoy finally has bald Xavier in the chair and wearing a nice suit. It then shows a close-up of him as he looks at the camera and fade to black.