Two things stop it from happening.
1. The legal issues are truly irreparable.
2. Hot Toys. If the license is available, they sure as **** wouldn't let that piece of real estate go to a competitor. They'd only release Deckard anyway with Rachel as a SDCC exclusive.
License issues are really only 'irreparable' if the actor and/or property owner have an artistic issue with merchandise.
eg Clint Eastwood simply never grants his likeness apparently.
Even then things change. The Bond franchise has apparently reversed their 'no figure toys!' stance of the last 10 years.
This isn't the case with Blade Runner and Harrison Ford.
The rest is only someone wanting to put in the effort to sort through the mess. Sideshow managed to sort through the Escape from New York mess which was once considered a huge issue.
As for Hot Toys .... I'm not sure what you mean.
Blade Runner is a niche license with a small group of hardcore fans. I don't think it would be much of a blip on their radar these days with Marvel and Star Wars swallowing up their resources. That's why a small company like Blitzway can grab things like Fight Club and Ghostbusters.