I think it's easy to underestimate the development and tooling costs to manufacture something like a woodworking plane, and easy to overestimate potential sales, especially for something already sold by (at least) two other premium makers. It's a financial risk for a small business to take, and in the current economic climate, risk-taking is a luxury a lot of businesses feel they can't afford.
Is there a case for someone to start making small quantities of such planes on a bugetary shoe-string, charging a premium price? Maybe, but the competition from Veritas and LN is an obstacle to sales.
I suspect that as the supply of good second-hand planes starts to slow (which it must at some point, because supply is finite), business opportunities for new offerings will start to look more promising, but that does rather depend on how the hand-tool woodworking market develops - if more people take up hobby woodworking or develop craft businesses, the market will expand. If the future becomes computerised everything, it might diminish. Who can predict which way things will go?