LEGO Ideas is the new name for the grassroots program that's seen sets like Ghostbusters, Minecraft and Back to the Future become LEGO reality. It will also, in my wildest dreams, let this monstrosity become something we can buy.
It looks like a nightmare to build, and would be prohibitively expensive. And that's assuming you've got somewhere to keep it once you'd built it.
But those are questions best left to academics and party poopers. When confronted with the chance to buy an Avengers Helicarrier that is 85 inches long and uses 22,694 bricks, you support it first and ask questions later.