Widescreen movies were created partially as a way to combat the encroaching threat of television - the screen was now bigger and better than any TV could hope to be. But that's been changing, and the latest weapon in the arsenal of lovers of theatrical experiences has been IMAX; more than just 3D the enormous size of the IMAX screen represents an experience that will be absolutely impossible to replicate at home or on your phone (until we get VR headsets). We've been seeing big release movies incorporating more and more IMAX footage, a charge led by people like Christopher Nolan and Michael Bay.
Now Marvel wants to take it to the next level: Avengers: Infinity War will be shot by Joe and Anthony Russo completely with IMAX cameras - specifically the new IMAX Arri Alexa 2D cameras. And this isn't going to be a quickie deal. According to IMAX CEO Greg
"The Russos are going to spend the next 15 months or so designing the making of the ‘Avengers’ films with these cameras in mind. They’re not looking at this a week before they start filming or only focusing on an important section of the film. This is something that’s never happened before."
That's a big deal. The movie will be designed with the IMAX frame in mind, but will be able to be shown in conventional theatrical aspect ratios as well; Tomorrowland is very much like this.
An even bigger deal: the way the Russos are calling these movies 'the climax' of the MCU:
"The intent with the Infinity War films is to bring ten years of accumulative storytelling to an incredible climax. We felt that the best way to exploit the scale and scope required to close out the final chapter of these three phases, was to be the first films shot entirely on the IMAX/ARRI Digital camera."
Marvel isn't going to reboot their universe after Infinity War, but I am thinking more and more that this is being viewed as the finale of a major chapter - not just a phase, but a whole age. What comes next? We'll see.