"lends itself to be told on a visual spectrum and this is optimised to it's fullest extent in IMAX 3D"
When an experience leads you to feel that you could be soaked, you're moving through time and space through superhuman speeds, you're experiencing enhanced technology, you have access to the most advanced technology, you are at one with the God's of legend and you have witnessed cinematic resurrection, you can only be watching a movie in IMAX 3D or be watching The Justice League. Or in this case both.
IMAX 3D allows you to watch the movie in a semi immersive way, adding and extra level of depth of enjoyment to the movie. In this case the individual superheroes Batman (Ben Affleck), Wonder Woman (Gal Gadot), Aqua Man (Jason Momoa), Cyborg (Ray Fisher), The Flash (Ezra Miller) and Superman (Henry Cavill) unite to battle Steppenwolf (voiced by Ciarán Hinds) under the banner of The Justice League and best watched in IMAX 3D encapsulating a greater visual impact on the viewer.
The nature of the story of The Justice League lends itself to be told on a visual spectrum and this is optimised to it's fullest extent in IMAX 3D.
Like IMAX say "watch the movie or be part of it" and in this case watch you can watch The Justice League defend our world or be 'participate' in their battle. The choice is yours.