It's not a question of worth. It's about musical integrity which Axl still got I believe. My guess is the tiny catalog bothers him which is great. Slash is back in Guns, why would he not attempt to hear what it sounds like with the classic guitar player? there is no reason.
It will take years but they've got nothing to lose when it comes to attempting to record a lot of music. If it's good enough for Axl and there is a reasonable deal, he'll release at least one more Guns album imo.
It's not about money anymore but the legacy seem very important to Axl. Slash and Duff must be dying to put their mark one more time on the catalog. I remain super optimistic.