Well, i can say from a large scale model part maker that there's not a ton of customers out there, but i've been "investing" in the larger scales. Particularly 1/16th.
There really hasn't been a big market for some of the new parts i've been coming out with, but my goal is try to help create one.
"if you build it, they will come", if you will.
I can't see any major manufacturer coming out with a new large scale kit, that wouldn't cost an arm and a leg.
I think the future of big scale is wrapped around the future of 3D printing.
As quality of 3D printing goes up, and the cost comes down, the larger scale markets will grow. But not with names like Revell or Tamiya leading the way, it will be companies like TDR who have the ability to produce high quality, and accurate 3D models to print. The only limitation TDR has with a perfect large scale product is the 3D printing technology.
One thing i'm certain of, is that if the 1:16th scale continues to grow, there will always be a line of Photoetched Brackets, Tabs, and Mounts by Dirt Modeler that will go right along with it.. and I'd put the quality of my products up against the biggest of the big photoetching companies out there. I just hope to warm more people to using brass over Nickel, since it's 1/2 the cost (and thus 1/2 the price).
My goal is to pull the costs of building in 1/16th down with a fleshed out line of photoetched products to build with.
I've dabbled in 1/12 and 1/8th, but those scales seem to really be cold. I rarely move any products at all at those scales.