So, they're going to talk to CBS. After they did all the work. And if CBS says no, then what?
CBS could also take it and run with it without having to pay any of them for the work they did.
Besides, people would probably accuse it of ripping off the Galaxy Quest rock monster. And yes, I know that rock monster was a reference to the one that was supposed to be in ST V, but others wouldn't know that.
That should never
be a reason against restoring a scene. It's not Star Trek V's fault that ten years later someone else took that idea and remade it.