The first trailer for Avengers: Infinity War featured the entire cast in dangerous situations, not least Vision, who is shown both in human form and being assaulted by the Children of Thanos. Being the product of an Infinity Stone - and having said Stone lodged in his forehead - means Vision was always going to play a pivotal in Infinity War when Thanos, the main antagonist, comes to earth in the first place to search for the stones. Unfortunately for the synthezoid this also makes it unlikely he's going to survive both Infinity War and Avengers 4; removing the Mind Stone from his forehead will surely kill him, and it'd be a bit of a let down if the purple titan came all this way and didn't get to bring all the stones together.
The two appearances of the synthetic humanoid tell a story in themselves: first is he and Scarlet Witch sharing an intimate moment together; the second is someone attempting to rip the stone out of him. Aside from Wanda Maximoff, Vision isn't seen with any of the other Avengers or adjacent co-stars (although we know they'll be reunited with some familiar faces), his absence is also conspicuous within the big, sweeping battle shots that make up the bulk of the teaser. Whatever happens to him, it looks like he doesn't get to hang with the other heroes which, with him being an obvious target of Thanos, feeds into some pretty big theories about his fate in the Marvel blockbuster.
We last saw Vision and Wanda living in the Avengers base, stuck there because of the Sokovia Accords. By Infinity War, they've upped sticks to Edinburgh. It would be logical that the Mind Stone in Vision's forehead senses the imminent arrival of Thanos and two more of the gems, allowing him and Tony Stark get some sort of plan together to put him out of harm's way. This could also explain the "human Vision" scene in the trailer - he could adopt a kind of incognito-mode, giving him more human-like skin and perhaps dulling the signal his stone puts out.
Later, when we see Vision being tortured as someone attempts to extract his stone, he's in his regular, red-skinned form. Going by the yellow scepter that's tearing into his skin, it's safe to say Corvus Glaive, one of Thanos' Black Order, is the one responsible. Known in the films as the Children of Thanos, these are a set of elite warriors chosen by the supervillain, another of whom, Proxima Midnight, makes a brief appearance in the trailer. So we can surmise that Vision's in seclusion to avoid detection and that said seclusion fails. What we don't know is the space between these events and where they figure in parallel to the rest of what's in the trailer.
However, there is an alternate take on these events. Vision still has the glow of the stone in his forehead by human, but given how extreme a transforming power would have to be on show, it's possible this is his emergency backup - a way to survive the gem being pulled from his head - or brought about by Scarlet Witch (whose powers, of course, come from the Mind Stone). It's hard to say with any degree of certainty from what's shown, although it does fit the themes of Vision. The character's genesis - from Tony Stark's A.I. butler J.A.R.V.I.S. to worthy android - already had a robot becoming "alive", so the next logical step would be for him to turn human - a move that would also extend the character's one-screen lifespan considerably. And, while that would be a big tease in a trailer, this was the subject of set photos a few months ago, so could be Marvel trying to get ahead of leaks.
An important note is that Vision's isn't the only confirmed Infinity Stone on Earth, Doctor Strange holds the Time Stone in the Eye of Agamotto, a fact paid no heed in the footage, although Strange is also not in attendance during the battle for the planet on the plains of Wakanda. Another consideration is that neither of these are the last needed as the Reality Stone, from Thor: The Dark World, is in the Collector's vault. So, a broad extrapolation to consider is that either Thanos or the Avengers get their hands on both Strange and Vision, with the war we see in the trailer being an effort by the assembled Avengers - Hulk-buster armor and all - to save/protect their comrades.
Whatever the setup of Avengers: Infinity War, there's no real way it won't see Vision separated from the Mind Stone. We don't know what Marvel's plan is for the climax to the Marvel Cinematic Universe in its current form, but given how tight details are about Avengers 4, it's presumably not going to hold back. However, due to the character's already-strange definition, that's not enough to say he's definitely gone: Marvel trailers are notoriously misleading, after all.
- Black Panther (2018) release date: Feb 16, 2018
- Avengers: Infinity War / The Avengers 3 (2018) release date: Apr 27, 2018
- Ant-Man & The Wasp (2018) release date: Jul 06, 2018
- Captain Marvel (2019) release date: Mar 08, 2019
- Spider-Man: Far From Home (2019) release date: Jul 05, 2019
- The Avengers 4 / Avengers: Endgame (2019) release date: Apr 26, 2019