I can't be the only one genuinely wondering how they are going to manage the suspension, wheel, and tire aspect of this car... I will be following...

 

You are perhaps assuming attempts at managing those aspects will be made. I'm as skeptical as you are.

 

This is me just brainstorming out loud so take it for what it is, but we know a miata can aggressively fit a 15x10 +25 under essentially a flat rolled OEM fender. The flares shown are at least another 4" (likely more) of width per side? Let's say you run an 18" diameter wheel and you want it flush to the new fenders per the render. That is one heck of an oddball spec wheel in regards to width and offset if you are keeping the OEM suspension. I'm not even sure that wheel exists short of some custom 3pc wheel. Even if it did, how will you turn without tire hitting fender if the hub is in OEM location?

The only solution I really see coming out of this would be some sort of pushrod suspension design that revamps the entire suspension and steering system on the chassis. Doing this properly is no small feat, but neither is the body work progress that they've made so far. This would be an incredible showcase of design and fabrication skills if this car came out of this build as functional as it looks in render... time will tell. I'm hoping my skepticism is wrong.

 

By the time you modify suspension (extended control arms etc) to move pivot points out you’d then need crazy spring rates to make it work. The Miata chassis would then reach its limit and become the weakest sprung part of that system. The 600+hp to push those tires and aero would add another element of problems. If this car is intended to be anything more than a prop I see a tube frame chassis underneath while using the skins shown to cover it all. Still none of it makes sense. I think someone with good sheet metal skills was bored and wanted to make a model car.

 

Obviously the answer is stretched 205's on a 10" wheel and 4" spacers.